Home / 738,687.40-1,108,031.10-612,716.20

Finding the Fourth Proportional to 738,687.40, 1,108,031.10 and 612,716.20

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Solution

The fourth proportional to 738,687.40, 1,108,031.10 and 612,716.20 is: 919,074.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    738,687.40 : 1,108,031.10 = 612,716.20 : x
  2. Step 2: Convert to fraction form
    738,687.40/1,108,031.10 = 612,716.20/x
  3. Step 3: Cross multiply
    738,687.40x = 1,108,031.10 × 612,716.20
  4. Step 4: Simplify right side
    738,687.40x = 678,908,605,073.82
  5. Step 5: Solve for x
    x = 678,908,605,073.82/738,687.40
  6. Step 6: Final answer
    x = 919,074.30

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Half scale
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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.