Home / 891,120.52-1,229,811.36-509,139.10

Finding the Fourth Proportional to 891,120.52, 1,229,811.36 and 509,139.10

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Solution

The fourth proportional to 891,120.52, 1,229,811.36 and 509,139.10 is: 702,649.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    891,120.52 : 1,229,811.36 = 509,139.10 : x
  2. Step 2: Convert to fraction form
    891,120.52/1,229,811.36 = 509,139.10/x
  3. Step 3: Cross multiply
    891,120.52x = 1,229,811.36 × 509,139.10
  4. Step 4: Simplify right side
    891,120.52x = 626,145,049,000.18
  5. Step 5: Solve for x
    x = 626,145,049,000.18/891,120.52
  6. Step 6: Final answer
    x = 702,649.12

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Double scale
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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.