Home / 918,140.40-1,377,340.20-286,988.40

Finding the Fourth Proportional to 918,140.40, 1,377,340.20 and 286,988.40

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Solution

The fourth proportional to 918,140.40, 1,377,340.20 and 286,988.40 is: 430,523.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    918,140.40 : 1,377,340.20 = 286,988.40 : x
  2. Step 2: Convert to fraction form
    918,140.40/1,377,340.20 = 286,988.40/x
  3. Step 3: Cross multiply
    918,140.40x = 1,377,340.20 × 286,988.40
  4. Step 4: Simplify right side
    918,140.40x = 395,280,660,253.68
  5. Step 5: Solve for x
    x = 395,280,660,253.68/918,140.40
  6. Step 6: Final answer
    x = 430,523.11

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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.