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Finding the Fourth Proportional to 482,756.20, 724,134.30 and 315,639.40

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Solution

The fourth proportional to 482,756.20, 724,134.30 and 315,639.40 is: 473,459.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    482,756.20 : 724,134.30 = 315,639.40 : x
  2. Step 2: Convert to fraction form
    482,756.20/724,134.30 = 315,639.40/x
  3. Step 3: Cross multiply
    482,756.20x = 724,134.30 × 315,639.40
  4. Step 4: Simplify right side
    482,756.20x = 228,565,315,971.42
  5. Step 5: Solve for x
    x = 228,565,315,971.42/482,756.20
  6. Step 6: Final answer
    x = 473,459.10

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1.5x scale

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.