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Finding the Fourth Proportional to 478,915.49, 660,931.29 and 274,966.80

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Solution

The fourth proportional to 478,915.49, 660,931.29 and 274,966.80 is: 379,470.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    478,915.49 : 660,931.29 = 274,966.80 : x
  2. Step 2: Convert to fraction form
    478,915.49/660,931.29 = 274,966.80/x
  3. Step 3: Cross multiply
    478,915.49x = 660,931.29 × 274,966.80
  4. Step 4: Simplify right side
    478,915.49x = 181,734,161,831.17
  5. Step 5: Solve for x
    x = 181,734,161,831.17/478,915.49
  6. Step 6: Final answer
    x = 379,470.21

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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.