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Finding the Fourth Proportional to 612,095.70, 918,143.55 and 470,378.10

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Solution

The fourth proportional to 612,095.70, 918,143.55 and 470,378.10 is: 705,567.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    612,095.70 : 918,143.55 = 470,378.10 : x
  2. Step 2: Convert to fraction form
    612,095.70/918,143.55 = 470,378.10/x
  3. Step 3: Cross multiply
    612,095.70x = 918,143.55 × 470,378.10
  4. Step 4: Simplify right side
    612,095.70x = 431,874,618,576.26
  5. Step 5: Solve for x
    x = 431,874,618,576.26/612,095.70
  6. Step 6: Final answer
    x = 705,567.15

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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.