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Finding the Fourth Proportional to 458,002.20, 686,808.90 and 221,417.40

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Solution

The fourth proportional to 458,002.20, 686,808.90 and 221,417.40 is: 332,032.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    458,002.20 : 686,808.90 = 221,417.40 : x
  2. Step 2: Convert to fraction form
    458,002.20/686,808.90 = 221,417.40/x
  3. Step 3: Cross multiply
    458,002.20x = 686,808.90 × 221,417.40
  4. Step 4: Simplify right side
    458,002.20x = 152,071,440,934.86
  5. Step 5: Solve for x
    x = 152,071,440,934.86/458,002.20
  6. Step 6: Final answer
    x = 332,032.12

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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.