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Finding the Fourth Proportional to 651,641.80, 977,462.70 and 561,440.20

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Solution

The fourth proportional to 651,641.80, 977,462.70 and 561,440.20 is: 842,160.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    651,641.80 : 977,462.70 = 561,440.20 : x
  2. Step 2: Convert to fraction form
    651,641.80/977,462.70 = 561,440.20/x
  3. Step 3: Cross multiply
    651,641.80x = 977,462.70 × 561,440.20
  4. Step 4: Simplify right side
    651,641.80x = 548,786,853,780.54
  5. Step 5: Solve for x
    x = 548,786,853,780.54/651,641.80
  6. Step 6: Final answer
    x = 842,160.30

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Double scale
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Similar ratio
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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.