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Finding the Fourth Proportional to 478,570.71, 717,970.62 and 137,018.89

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Solution

The fourth proportional to 478,570.71, 717,970.62 and 137,018.89 is: 205,561.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    478,570.71 : 717,970.62 = 137,018.89 : x
  2. Step 2: Convert to fraction form
    478,570.71/717,970.62 = 137,018.89/x
  3. Step 3: Cross multiply
    478,570.71x = 717,970.62 × 137,018.89
  4. Step 4: Simplify right side
    478,570.71x = 98,375,533,815.16
  5. Step 5: Solve for x
    x = 98,375,533,815.16/478,570.71
  6. Step 6: Final answer
    x = 205,561.13

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.