Home / 874,729,407.76-1,207,128,753.12-478,277,979.28

Finding the Fourth Proportional to 874,729,407.76, 1,207,128,753.12 and 478,277,979.28

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Solution

The fourth proportional to 874,729,407.76, 1,207,128,753.12 and 478,277,979.28 is: 660,024,798.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    874,729,407.76 : 1,207,128,753.12 = 478,277,979.28 : x
  2. Step 2: Convert to fraction form
    874,729,407.76/1,207,128,753.12 = 478,277,979.28/x
  3. Step 3: Cross multiply
    874,729,407.76x = 1,207,128,753.12 × 478,277,979.28
  4. Step 4: Simplify right side
    874,729,407.76x = 577,343,100,773,019,520
  5. Step 5: Solve for x
    x = 577,343,100,773,019,520/874,729,407.76
  6. Step 6: Final answer
    x = 660,024,798.13

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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.