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Finding the Fourth Proportional to 458,728.40, 686,710.20 and 403,432.40

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Solution

The fourth proportional to 458,728.40, 686,710.20 and 403,432.40 is: 603,932.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    458,728.40 : 686,710.20 = 403,432.40 : x
  2. Step 2: Convert to fraction form
    458,728.40/686,710.20 = 403,432.40/x
  3. Step 3: Cross multiply
    458,728.40x = 686,710.20 × 403,432.40
  4. Step 4: Simplify right side
    458,728.40x = 277,041,144,090.48
  5. Step 5: Solve for x
    x = 277,041,144,090.48/458,728.40
  6. Step 6: Final answer
    x = 603,932.84

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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.