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Finding the Fourth Proportional to 625,645.20, 938,467.80 and 310,717.20

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Solution

The fourth proportional to 625,645.20, 938,467.80 and 310,717.20 is: 466,075.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    625,645.20 : 938,467.80 = 310,717.20 : x
  2. Step 2: Convert to fraction form
    625,645.20/938,467.80 = 310,717.20/x
  3. Step 3: Cross multiply
    625,645.20x = 938,467.80 × 310,717.20
  4. Step 4: Simplify right side
    625,645.20x = 291,598,087,106.16
  5. Step 5: Solve for x
    x = 291,598,087,106.16/625,645.20
  6. Step 6: Final answer
    x = 466,075.80

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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.