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Finding the Fourth Proportional to 714,710.52, 986,316.41 and 392,421.89

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Solution

The fourth proportional to 714,710.52, 986,316.41 and 392,421.89 is: 541,550.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    714,710.52 : 986,316.41 = 392,421.89 : x
  2. Step 2: Convert to fraction form
    714,710.52/986,316.41 = 392,421.89/x
  3. Step 3: Cross multiply
    714,710.52x = 986,316.41 × 392,421.89
  4. Step 4: Simplify right side
    714,710.52x = 387,052,153,197.06
  5. Step 5: Solve for x
    x = 387,052,153,197.06/714,710.52
  6. Step 6: Final answer
    x = 541,550.94

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Double scale
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1.5x scale

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.