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Finding the Fourth Proportional to 586,609.72, 809,521.38 and 318,337.72

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Solution

The fourth proportional to 586,609.72, 809,521.38 and 318,337.72 is: 439,306.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    586,609.72 : 809,521.38 = 318,337.72 : x
  2. Step 2: Convert to fraction form
    586,609.72/809,521.38 = 318,337.72/x
  3. Step 3: Cross multiply
    586,609.72x = 809,521.38 × 318,337.72
  4. Step 4: Simplify right side
    586,609.72x = 257,701,190,400.45
  5. Step 5: Solve for x
    x = 257,701,190,400.45/586,609.72
  6. Step 6: Final answer
    x = 439,306.04

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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.