Home / 687,631.40-1,028,531.10-617,064.20

Finding the Fourth Proportional to 687,631.40, 1,028,531.10 and 617,064.20

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Solution

The fourth proportional to 687,631.40, 1,028,531.10 and 617,064.20 is: 922,979.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    687,631.40 : 1,028,531.10 = 617,064.20 : x
  2. Step 2: Convert to fraction form
    687,631.40/1,028,531.10 = 617,064.20/x
  3. Step 3: Cross multiply
    687,631.40x = 1,028,531.10 × 617,064.20
  4. Step 4: Simplify right side
    687,631.40x = 634,669,720,396.62
  5. Step 5: Solve for x
    x = 634,669,720,396.62/687,631.40
  6. Step 6: Final answer
    x = 922,979.55

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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.