Home / 745,779.36-1,029,200.40-406,279.20

Finding the Fourth Proportional to 745,779.36, 1,029,200.40 and 406,279.20

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Solution

The fourth proportional to 745,779.36, 1,029,200.40 and 406,279.20 is: 560,678.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    745,779.36 : 1,029,200.40 = 406,279.20 : x
  2. Step 2: Convert to fraction form
    745,779.36/1,029,200.40 = 406,279.20/x
  3. Step 3: Cross multiply
    745,779.36x = 1,029,200.40 × 406,279.20
  4. Step 4: Simplify right side
    745,779.36x = 418,142,715,151.68
  5. Step 5: Solve for x
    x = 418,142,715,151.68/745,779.36
  6. Step 6: Final answer
    x = 560,678.85

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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.