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Finding the Fourth Proportional to 423,403.48, 634,964.28 and 123,901.12

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Solution

The fourth proportional to 423,403.48, 634,964.28 and 123,901.12 is: 185,810.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    423,403.48 : 634,964.28 = 123,901.12 : x
  2. Step 2: Convert to fraction form
    423,403.48/634,964.28 = 123,901.12/x
  3. Step 3: Cross multiply
    423,403.48x = 634,964.28 × 123,901.12
  4. Step 4: Simplify right side
    423,403.48x = 78,672,785,451.99
  5. Step 5: Solve for x
    x = 78,672,785,451.99/423,403.48
  6. Step 6: Final answer
    x = 185,810.44

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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.