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Finding the Fourth Proportional to 603,122.30, 904,683.45 and 390,545.90

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Solution

The fourth proportional to 603,122.30, 904,683.45 and 390,545.90 is: 585,818.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    603,122.30 : 904,683.45 = 390,545.90 : x
  2. Step 2: Convert to fraction form
    603,122.30/904,683.45 = 390,545.90/x
  3. Step 3: Cross multiply
    603,122.30x = 904,683.45 × 390,545.90
  4. Step 4: Simplify right side
    603,122.30x = 353,320,412,195.36
  5. Step 5: Solve for x
    x = 353,320,412,195.36/603,122.30
  6. Step 6: Final answer
    x = 585,818.85

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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.