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Finding the Fourth Proportional to 586,609.22, 809,520.69 and 318,337.22

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Solution

The fourth proportional to 586,609.22, 809,520.69 and 318,337.22 is: 439,305.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    586,609.22 : 809,520.69 = 318,337.22 : x
  2. Step 2: Convert to fraction form
    586,609.22/809,520.69 = 318,337.22/x
  3. Step 3: Cross multiply
    586,609.22x = 809,520.69 × 318,337.22
  4. Step 4: Simplify right side
    586,609.22x = 257,700,565,987.08
  5. Step 5: Solve for x
    x = 257,700,565,987.08/586,609.22
  6. Step 6: Final answer
    x = 439,305.35

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Double scale
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Similar ratio
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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.