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Finding the Fourth Proportional to 693,306.10, 1,039,959.15 and 393,670.90

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Solution

The fourth proportional to 693,306.10, 1,039,959.15 and 393,670.90 is: 590,506.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    693,306.10 : 1,039,959.15 = 393,670.90 : x
  2. Step 2: Convert to fraction form
    693,306.10/1,039,959.15 = 393,670.90/x
  3. Step 3: Cross multiply
    693,306.10x = 1,039,959.15 × 393,670.90
  4. Step 4: Simplify right side
    693,306.10x = 409,401,654,543.74
  5. Step 5: Solve for x
    x = 409,401,654,543.74/693,306.10
  6. Step 6: Final answer
    x = 590,506.35

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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 (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.