Home / 918,061.40-1,377,221.70-286,909.40

Finding the Fourth Proportional to 918,061.40, 1,377,221.70 and 286,909.40

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Solution

The fourth proportional to 918,061.40, 1,377,221.70 and 286,909.40 is: 430,404.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    918,061.40 : 1,377,221.70 = 286,909.40 : x
  2. Step 2: Convert to fraction form
    918,061.40/1,377,221.70 = 286,909.40/x
  3. Step 3: Cross multiply
    918,061.40x = 1,377,221.70 × 286,909.40
  4. Step 4: Simplify right side
    918,061.40x = 395,137,851,613.98
  5. Step 5: Solve for x
    x = 395,137,851,613.98/918,061.40
  6. Step 6: Final answer
    x = 430,404.60

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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.