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Finding the Fourth Proportional to 458,001.70, 686,808.15 and 221,416.90

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Solution

The fourth proportional to 458,001.70, 686,808.15 and 221,416.90 is: 332,031.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    458,001.70 : 686,808.15 = 221,416.90 : x
  2. Step 2: Convert to fraction form
    458,001.70/686,808.15 = 221,416.90/x
  3. Step 3: Cross multiply
    458,001.70x = 686,808.15 × 221,416.90
  4. Step 4: Simplify right side
    458,001.70x = 152,070,931,467.74
  5. Step 5: Solve for x
    x = 152,070,931,467.74/458,001.70
  6. Step 6: Final answer
    x = 332,031.37

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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.