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Finding the Fourth Proportional to 630,624.40, 944,381.40 and 419,117.20

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Solution

The fourth proportional to 630,624.40, 944,381.40 and 419,117.20 is: 627,642.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    630,624.40 : 944,381.40 = 419,117.20 : x
  2. Step 2: Convert to fraction form
    630,624.40/944,381.40 = 419,117.20/x
  3. Step 3: Cross multiply
    630,624.40x = 944,381.40 × 419,117.20
  4. Step 4: Simplify right side
    630,624.40x = 395,806,488,100.08
  5. Step 5: Solve for x
    x = 395,806,488,100.08/630,624.40
  6. Step 6: Final answer
    x = 627,642.20

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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.