Home / 687,123.90-1,030,685.85-351,200.70

Finding the Fourth Proportional to 687,123.90, 1,030,685.85 and 351,200.70

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Solution

The fourth proportional to 687,123.90, 1,030,685.85 and 351,200.70 is: 526,801.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    687,123.90 : 1,030,685.85 = 351,200.70 : x
  2. Step 2: Convert to fraction form
    687,123.90/1,030,685.85 = 351,200.70/x
  3. Step 3: Cross multiply
    687,123.90x = 1,030,685.85 × 351,200.70
  4. Step 4: Simplify right side
    687,123.90x = 361,977,592,000.10
  5. Step 5: Solve for x
    x = 361,977,592,000.10/687,123.90
  6. Step 6: Final answer
    x = 526,801.05

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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.