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Finding the Fourth Proportional to 288,001.70, 432,002.55 and 257,675.30

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Solution

The fourth proportional to 288,001.70, 432,002.55 and 257,675.30 is: 386,512.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    288,001.70 : 432,002.55 = 257,675.30 : x
  2. Step 2: Convert to fraction form
    288,001.70/432,002.55 = 257,675.30/x
  3. Step 3: Cross multiply
    288,001.70x = 432,002.55 × 257,675.30
  4. Step 4: Simplify right side
    288,001.70x = 111,316,386,672.02
  5. Step 5: Solve for x
    x = 111,316,386,672.02/288,001.70
  6. Step 6: Final answer
    x = 386,512.95

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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.