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Finding the Fourth Proportional to 620,447.40, 930,671.10 and 496,031.40

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Solution

The fourth proportional to 620,447.40, 930,671.10 and 496,031.40 is: 744,047.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    620,447.40 : 930,671.10 = 496,031.40 : x
  2. Step 2: Convert to fraction form
    620,447.40/930,671.10 = 496,031.40/x
  3. Step 3: Cross multiply
    620,447.40x = 930,671.10 × 496,031.40
  4. Step 4: Simplify right side
    620,447.40x = 461,642,088,672.54
  5. Step 5: Solve for x
    x = 461,642,088,672.54/620,447.40
  6. Step 6: Final answer
    x = 744,047.10

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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.