Home / 712,000.40-1,068,000.60-687,117.20

Finding the Fourth Proportional to 712,000.40, 1,068,000.60 and 687,117.20

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Solution

The fourth proportional to 712,000.40, 1,068,000.60 and 687,117.20 is: 1,030,675.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    712,000.40 : 1,068,000.60 = 687,117.20 : x
  2. Step 2: Convert to fraction form
    712,000.40/1,068,000.60 = 687,117.20/x
  3. Step 3: Cross multiply
    712,000.40x = 1,068,000.60 × 687,117.20
  4. Step 4: Simplify right side
    712,000.40x = 733,841,581,870.32
  5. Step 5: Solve for x
    x = 733,841,581,870.32/712,000.40
  6. Step 6: Final answer
    x = 1,030,675.80

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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.