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Finding the Fourth Proportional to 503,785.70, 755,678.55 and 389,624.30

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Solution

The fourth proportional to 503,785.70, 755,678.55 and 389,624.30 is: 584,436.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    503,785.70 : 755,678.55 = 389,624.30 : x
  2. Step 2: Convert to fraction form
    503,785.70/755,678.55 = 389,624.30/x
  3. Step 3: Cross multiply
    503,785.70x = 755,678.55 × 389,624.30
  4. Step 4: Simplify right side
    503,785.70x = 294,430,726,068.77
  5. Step 5: Solve for x
    x = 294,430,726,068.77/503,785.70
  6. Step 6: Final answer
    x = 584,436.45

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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.