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Finding the Fourth Proportional to 637,812.20, 954,875.10 and 388,980.20

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Solution

The fourth proportional to 637,812.20, 954,875.10 and 388,980.20 is: 582,346.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    637,812.20 : 954,875.10 = 388,980.20 : x
  2. Step 2: Convert to fraction form
    637,812.20/954,875.10 = 388,980.20/x
  3. Step 3: Cross multiply
    637,812.20x = 954,875.10 × 388,980.20
  4. Step 4: Simplify right side
    637,812.20x = 371,427,507,373.02
  5. Step 5: Solve for x
    x = 371,427,507,373.02/637,812.20
  6. Step 6: Final answer
    x = 582,346.19

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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.