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Finding the Fourth Proportional to 390,972.34, 539,381.46 and 237,887.81

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Solution

The fourth proportional to 390,972.34, 539,381.46 and 237,887.81 is: 328,187.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    390,972.34 : 539,381.46 = 237,887.81 : x
  2. Step 2: Convert to fraction form
    390,972.34/539,381.46 = 237,887.81/x
  3. Step 3: Cross multiply
    390,972.34x = 539,381.46 × 237,887.81
  4. Step 4: Simplify right side
    390,972.34x = 128,312,274,274.00
  5. Step 5: Solve for x
    x = 128,312,274,274.00/390,972.34
  6. Step 6: Final answer
    x = 328,187.60

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.