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Finding the Fourth Proportional to 660,071.52, 910,915.20 and 358,264.80

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Solution

The fourth proportional to 660,071.52, 910,915.20 and 358,264.80 is: 494,414.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    660,071.52 : 910,915.20 = 358,264.80 : x
  2. Step 2: Convert to fraction form
    660,071.52/910,915.20 = 358,264.80/x
  3. Step 3: Cross multiply
    660,071.52x = 910,915.20 × 358,264.80
  4. Step 4: Simplify right side
    660,071.52x = 326,348,851,944.96
  5. Step 5: Solve for x
    x = 326,348,851,944.96/660,071.52
  6. Step 6: Final answer
    x = 494,414.38

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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.