Home / 688,847.40-1,031,427.90-438,172.20

Finding the Fourth Proportional to 688,847.40, 1,031,427.90 and 438,172.20

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Solution

The fourth proportional to 688,847.40, 1,031,427.90 and 438,172.20 is: 656,085.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    688,847.40 : 1,031,427.90 = 438,172.20 : x
  2. Step 2: Convert to fraction form
    688,847.40/1,031,427.90 = 438,172.20/x
  3. Step 3: Cross multiply
    688,847.40x = 1,031,427.90 × 438,172.20
  4. Step 4: Simplify right side
    688,847.40x = 451,943,032,084.38
  5. Step 5: Solve for x
    x = 451,943,032,084.38/688,847.40
  6. Step 6: Final answer
    x = 656,085.85

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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.