Home / 687,066.30-1,030,599.45-406,439.10

Finding the Fourth Proportional to 687,066.30, 1,030,599.45 and 406,439.10

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Solution

The fourth proportional to 687,066.30, 1,030,599.45 and 406,439.10 is: 609,658.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    687,066.30 : 1,030,599.45 = 406,439.10 : x
  2. Step 2: Convert to fraction form
    687,066.30/1,030,599.45 = 406,439.10/x
  3. Step 3: Cross multiply
    687,066.30x = 1,030,599.45 × 406,439.10
  4. Step 4: Simplify right side
    687,066.30x = 418,875,912,918.50
  5. Step 5: Solve for x
    x = 418,875,912,918.50/687,066.30
  6. Step 6: Final answer
    x = 609,658.65

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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.