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Finding the Fourth Proportional to 612,101.40, 918,152.10 and 387,715.20

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Solution

The fourth proportional to 612,101.40, 918,152.10 and 387,715.20 is: 581,572.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    612,101.40 : 918,152.10 = 387,715.20 : x
  2. Step 2: Convert to fraction form
    612,101.40/918,152.10 = 387,715.20/x
  3. Step 3: Cross multiply
    612,101.40x = 918,152.10 × 387,715.20
  4. Step 4: Simplify right side
    612,101.40x = 355,981,525,081.92
  5. Step 5: Solve for x
    x = 355,981,525,081.92/612,101.40
  6. Step 6: Final answer
    x = 581,572.80

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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.