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Finding the Fourth Proportional to 656,356.80, 982,566.90 and 389,980.20

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Solution

The fourth proportional to 656,356.80, 982,566.90 and 389,980.20 is: 583,800.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    656,356.80 : 982,566.90 = 389,980.20 : x
  2. Step 2: Convert to fraction form
    656,356.80/982,566.90 = 389,980.20/x
  3. Step 3: Cross multiply
    656,356.80x = 982,566.90 × 389,980.20
  4. Step 4: Simplify right side
    656,356.80x = 383,181,636,175.38
  5. Step 5: Solve for x
    x = 383,181,636,175.38/656,356.80
  6. Step 6: Final answer
    x = 583,800.82

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Double scale
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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.