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Finding the Fourth Proportional to 571,639.59, 857,459.70 and 145,207.40

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Solution

The fourth proportional to 571,639.59, 857,459.70 and 145,207.40 is: 217,811.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    571,639.59 : 857,459.70 = 145,207.40 : x
  2. Step 2: Convert to fraction form
    571,639.59/857,459.70 = 145,207.40/x
  3. Step 3: Cross multiply
    571,639.59x = 857,459.70 × 145,207.40
  4. Step 4: Simplify right side
    571,639.59x = 124,509,489,354.48
  5. Step 5: Solve for x
    x = 124,509,489,354.48/571,639.59
  6. Step 6: Final answer
    x = 217,811.17

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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.