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Finding the Fourth Proportional to 612,114.30, 918,171.45 and 446,226.30

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Solution

The fourth proportional to 612,114.30, 918,171.45 and 446,226.30 is: 669,339.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    612,114.30 : 918,171.45 = 446,226.30 : x
  2. Step 2: Convert to fraction form
    612,114.30/918,171.45 = 446,226.30/x
  3. Step 3: Cross multiply
    612,114.30x = 918,171.45 × 446,226.30
  4. Step 4: Simplify right side
    612,114.30x = 409,712,248,899.14
  5. Step 5: Solve for x
    x = 409,712,248,899.14/612,114.30
  6. Step 6: Final answer
    x = 669,339.45

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Half scale
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Double scale
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Similar ratio
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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.