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Finding the Fourth Proportional to 715,505.60, 987,394.51 and 409,580.30

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Solution

The fourth proportional to 715,505.60, 987,394.51 and 409,580.30 is: 565,218.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    715,505.60 : 987,394.51 = 409,580.30 : x
  2. Step 2: Convert to fraction form
    715,505.60/987,394.51 = 409,580.30/x
  3. Step 3: Cross multiply
    715,505.60x = 987,394.51 × 409,580.30
  4. Step 4: Simplify right side
    715,505.60x = 404,417,334,746.63
  5. Step 5: Solve for x
    x = 404,417,334,746.63/715,505.60
  6. Step 6: Final answer
    x = 565,218.96

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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.