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Finding the Fourth Proportional to 288,658.40, 432,910.80 and 88,978.40

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Solution

The fourth proportional to 288,658.40, 432,910.80 and 88,978.40 is: 133,443.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    288,658.40 : 432,910.80 = 88,978.40 : x
  2. Step 2: Convert to fraction form
    288,658.40/432,910.80 = 88,978.40/x
  3. Step 3: Cross multiply
    288,658.40x = 432,910.80 × 88,978.40
  4. Step 4: Simplify right side
    288,658.40x = 38,519,710,326.72
  5. Step 5: Solve for x
    x = 38,519,710,326.72/288,658.40
  6. Step 6: Final answer
    x = 133,443.93

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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.