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Finding the Fourth Proportional to 484,397.69, 726,448.75 and 389,402.61

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Solution

The fourth proportional to 484,397.69, 726,448.75 and 389,402.61 is: 583,985.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    484,397.69 : 726,448.75 = 389,402.61 : x
  2. Step 2: Convert to fraction form
    484,397.69/726,448.75 = 389,402.61/x
  3. Step 3: Cross multiply
    484,397.69x = 726,448.75 × 389,402.61
  4. Step 4: Simplify right side
    484,397.69x = 282,881,033,701.98
  5. Step 5: Solve for x
    x = 282,881,033,701.98/484,397.69
  6. Step 6: Final answer
    x = 583,985.11

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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.