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Finding the Fourth Proportional to 717,829.20, 990,430.95 and 472,788

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Solution

The fourth proportional to 717,829.20, 990,430.95 and 472,788 is: 652,333.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    717,829.20 : 990,430.95 = 472,788 : x
  2. Step 2: Convert to fraction form
    717,829.20/990,430.95 = 472,788/x
  3. Step 3: Cross multiply
    717,829.20x = 990,430.95 × 472,788
  4. Step 4: Simplify right side
    717,829.20x = 468,263,867,988.60
  5. Step 5: Solve for x
    x = 468,263,867,988.60/717,829.20
  6. Step 6: Final answer
    x = 652,333.27

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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.