Home / 918,152.80-1,377,229.20-287,130.40

Finding the Fourth Proportional to 918,152.80, 1,377,229.20 and 287,130.40

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Solution

The fourth proportional to 918,152.80, 1,377,229.20 and 287,130.40 is: 430,695.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    918,152.80 : 1,377,229.20 = 287,130.40 : x
  2. Step 2: Convert to fraction form
    918,152.80/1,377,229.20 = 287,130.40/x
  3. Step 3: Cross multiply
    918,152.80x = 1,377,229.20 × 287,130.40
  4. Step 4: Simplify right side
    918,152.80x = 395,444,371,087.68
  5. Step 5: Solve for x
    x = 395,444,371,087.68/918,152.80
  6. Step 6: Final answer
    x = 430,695.60

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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.