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Finding the Fourth Proportional to 458,502.40, 686,198.40 and 402,515.20

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Solution

The fourth proportional to 458,502.40, 686,198.40 and 402,515.20 is: 602,407.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    458,502.40 : 686,198.40 = 402,515.20 : x
  2. Step 2: Convert to fraction form
    458,502.40/686,198.40 = 402,515.20/x
  3. Step 3: Cross multiply
    458,502.40x = 686,198.40 × 402,515.20
  4. Step 4: Simplify right side
    458,502.40x = 276,205,286,215.68
  5. Step 5: Solve for x
    x = 276,205,286,215.68/458,502.40
  6. Step 6: Final answer
    x = 602,407.50

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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.