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Finding the Fourth Proportional to 578,039.49, 866,337.12 and 278,464.23

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Solution

The fourth proportional to 578,039.49, 866,337.12 and 278,464.23 is: 417,348.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    578,039.49 : 866,337.12 = 278,464.23 : x
  2. Step 2: Convert to fraction form
    578,039.49/866,337.12 = 278,464.23/x
  3. Step 3: Cross multiply
    578,039.49x = 866,337.12 × 278,464.23
  4. Step 4: Simplify right side
    578,039.49x = 241,243,899,041.22
  5. Step 5: Solve for x
    x = 241,243,899,041.22/578,039.49
  6. Step 6: Final answer
    x = 417,348.47

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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.