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Finding the Fourth Proportional to 709,917.66, 979,681.46 and 387,627.57

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Solution

The fourth proportional to 709,917.66, 979,681.46 and 387,627.57 is: 534,923.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    709,917.66 : 979,681.46 = 387,627.57 : x
  2. Step 2: Convert to fraction form
    709,917.66/979,681.46 = 387,627.57/x
  3. Step 3: Cross multiply
    709,917.66x = 979,681.46 × 387,627.57
  4. Step 4: Simplify right side
    709,917.66x = 379,751,541,775.71
  5. Step 5: Solve for x
    x = 379,751,541,775.71/709,917.66
  6. Step 6: Final answer
    x = 534,923.36

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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.