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Finding the Fourth Proportional to 875,680.52, 1,208,411.70 and 513,345.70

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Solution

The fourth proportional to 875,680.52, 1,208,411.70 and 513,345.70 is: 708,400.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    875,680.52 : 1,208,411.70 = 513,345.70 : x
  2. Step 2: Convert to fraction form
    875,680.52/1,208,411.70 = 513,345.70/x
  3. Step 3: Cross multiply
    875,680.52x = 1,208,411.70 × 513,345.70
  4. Step 4: Simplify right side
    875,680.52x = 620,332,950,024.69
  5. Step 5: Solve for x
    x = 620,332,950,024.69/875,680.52
  6. Step 6: Final answer
    x = 708,400.99

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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.