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Finding the Fourth Proportional to 709,858.59, 979,626.38 and 403,978.92

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Solution

The fourth proportional to 709,858.59, 979,626.38 and 403,978.92 is: 557,503.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    709,858.59 : 979,626.38 = 403,978.92 : x
  2. Step 2: Convert to fraction form
    709,858.59/979,626.38 = 403,978.92/x
  3. Step 3: Cross multiply
    709,858.59x = 979,626.38 × 403,978.92
  4. Step 4: Simplify right side
    709,858.59x = 395,748,406,995.91
  5. Step 5: Solve for x
    x = 395,748,406,995.91/709,858.59
  6. Step 6: Final answer
    x = 557,503.16

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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.