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Finding the Fourth Proportional to 478,243.04, 717,459.18 and 136,689.56

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Solution

The fourth proportional to 478,243.04, 717,459.18 and 136,689.56 is: 205,061.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    478,243.04 : 717,459.18 = 136,689.56 : x
  2. Step 2: Convert to fraction form
    478,243.04/717,459.18 = 136,689.56/x
  3. Step 3: Cross multiply
    478,243.04x = 717,459.18 × 136,689.56
  4. Step 4: Simplify right side
    478,243.04x = 98,069,179,632.16
  5. Step 5: Solve for x
    x = 98,069,179,632.16/478,243.04
  6. Step 6: Final answer
    x = 205,061.38

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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.