Home / 745,412.70-1,028,407.23-487,440.66

Finding the Fourth Proportional to 745,412.70, 1,028,407.23 and 487,440.66

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Solution

The fourth proportional to 745,412.70, 1,028,407.23 and 487,440.66 is: 672,496.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    745,412.70 : 1,028,407.23 = 487,440.66 : x
  2. Step 2: Convert to fraction form
    745,412.70/1,028,407.23 = 487,440.66/x
  3. Step 3: Cross multiply
    745,412.70x = 1,028,407.23 × 487,440.66
  4. Step 4: Simplify right side
    745,412.70x = 501,287,498,939.97
  5. Step 5: Solve for x
    x = 501,287,498,939.97/745,412.70
  6. Step 6: Final answer
    x = 672,496.59

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Double scale
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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.