Home / 712,853.40-1,069,280.10-665,614.20

Finding the Fourth Proportional to 712,853.40, 1,069,280.10 and 665,614.20

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Solution

The fourth proportional to 712,853.40, 1,069,280.10 and 665,614.20 is: 998,421.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    712,853.40 : 1,069,280.10 = 665,614.20 : x
  2. Step 2: Convert to fraction form
    712,853.40/1,069,280.10 = 665,614.20/x
  3. Step 3: Cross multiply
    712,853.40x = 1,069,280.10 × 665,614.20
  4. Step 4: Simplify right side
    712,853.40x = 711,728,018,337.42
  5. Step 5: Solve for x
    x = 711,728,018,337.42/712,853.40
  6. Step 6: Final answer
    x = 998,421.30

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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.