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Finding the Fourth Proportional to 478,688.68, 718,085.56 and 238,862.94

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Solution

The fourth proportional to 478,688.68, 718,085.56 and 238,862.94 is: 358,320.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    478,688.68 : 718,085.56 = 238,862.94 : x
  2. Step 2: Convert to fraction form
    478,688.68/718,085.56 = 238,862.94/x
  3. Step 3: Cross multiply
    478,688.68x = 718,085.56 × 238,862.94
  4. Step 4: Simplify right side
    478,688.68x = 171,524,028,033.15
  5. Step 5: Solve for x
    x = 171,524,028,033.15/478,688.68
  6. Step 6: Final answer
    x = 358,320.63

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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.