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Finding the Fourth Proportional to 495,492.80, 743,584.80 and 318,430.40

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Solution

The fourth proportional to 495,492.80, 743,584.80 and 318,430.40 is: 477,867.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    495,492.80 : 743,584.80 = 318,430.40 : x
  2. Step 2: Convert to fraction form
    495,492.80/743,584.80 = 318,430.40/x
  3. Step 3: Cross multiply
    495,492.80x = 743,584.80 × 318,430.40
  4. Step 4: Simplify right side
    495,492.80x = 236,780,005,297.92
  5. Step 5: Solve for x
    x = 236,780,005,297.92/495,492.80
  6. Step 6: Final answer
    x = 477,867.70

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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.