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Finding the Fourth Proportional to 581,721.80, 872,582.70 and 155,256.80

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Solution

The fourth proportional to 581,721.80, 872,582.70 and 155,256.80 is: 232,885.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    581,721.80 : 872,582.70 = 155,256.80 : x
  2. Step 2: Convert to fraction form
    581,721.80/872,582.70 = 155,256.80/x
  3. Step 3: Cross multiply
    581,721.80x = 872,582.70 × 155,256.80
  4. Step 4: Simplify right side
    581,721.80x = 135,474,397,737.36
  5. Step 5: Solve for x
    x = 135,474,397,737.36/581,721.80
  6. Step 6: Final answer
    x = 232,885.20

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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.