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Finding the Fourth Proportional to 858,266.70, 1,287,400.05 and 480,353.10

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Solution

The fourth proportional to 858,266.70, 1,287,400.05 and 480,353.10 is: 720,529.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    858,266.70 : 1,287,400.05 = 480,353.10 : x
  2. Step 2: Convert to fraction form
    858,266.70/1,287,400.05 = 480,353.10/x
  3. Step 3: Cross multiply
    858,266.70x = 1,287,400.05 × 480,353.10
  4. Step 4: Simplify right side
    858,266.70x = 618,406,604,957.66
  5. Step 5: Solve for x
    x = 618,406,604,957.66/858,266.70
  6. Step 6: Final answer
    x = 720,529.65

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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.