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Finding the Fourth Proportional to 356,421.70, 534,776.55 and 156,780.10

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Solution

The fourth proportional to 356,421.70, 534,776.55 and 156,780.10 is: 235,233.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    356,421.70 : 534,776.55 = 156,780.10 : x
  2. Step 2: Convert to fraction form
    356,421.70/534,776.55 = 156,780.10/x
  3. Step 3: Cross multiply
    356,421.70x = 534,776.55 × 156,780.10
  4. Step 4: Simplify right side
    356,421.70x = 83,842,320,986.66
  5. Step 5: Solve for x
    x = 83,842,320,986.66/356,421.70
  6. Step 6: Final answer
    x = 235,233.49

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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.