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Finding the Fourth Proportional to 652,115.70, 978,173.55 and 402,938.10

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Solution

The fourth proportional to 652,115.70, 978,173.55 and 402,938.10 is: 604,407.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    652,115.70 : 978,173.55 = 402,938.10 : x
  2. Step 2: Convert to fraction form
    652,115.70/978,173.55 = 402,938.10/x
  3. Step 3: Cross multiply
    652,115.70x = 978,173.55 × 402,938.10
  4. Step 4: Simplify right side
    652,115.70x = 394,143,391,707.26
  5. Step 5: Solve for x
    x = 394,143,391,707.26/652,115.70
  6. Step 6: Final answer
    x = 604,407.15

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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.