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Finding the Fourth Proportional to 612,021.40, 918,032.10 and 608,522.20

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Solution

The fourth proportional to 612,021.40, 918,032.10 and 608,522.20 is: 912,783.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    612,021.40 : 918,032.10 = 608,522.20 : x
  2. Step 2: Convert to fraction form
    612,021.40/918,032.10 = 608,522.20/x
  3. Step 3: Cross multiply
    612,021.40x = 918,032.10 × 608,522.20
  4. Step 4: Simplify right side
    612,021.40x = 558,642,913,162.62
  5. Step 5: Solve for x
    x = 558,642,913,162.62/612,021.40
  6. Step 6: Final answer
    x = 912,783.30

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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.