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Finding the Fourth Proportional to 495,966.80, 744,295.80 and 318,904.40

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Solution

The fourth proportional to 495,966.80, 744,295.80 and 318,904.40 is: 478,578.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    495,966.80 : 744,295.80 = 318,904.40 : x
  2. Step 2: Convert to fraction form
    495,966.80/744,295.80 = 318,904.40/x
  3. Step 3: Cross multiply
    495,966.80x = 744,295.80 × 318,904.40
  4. Step 4: Simplify right side
    495,966.80x = 237,359,205,521.52
  5. Step 5: Solve for x
    x = 237,359,205,521.52/495,966.80
  6. Step 6: Final answer
    x = 478,578.82

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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.