Home / 756,385.40-1,134,578.10-423,918.20

Finding the Fourth Proportional to 756,385.40, 1,134,578.10 and 423,918.20

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Solution

The fourth proportional to 756,385.40, 1,134,578.10 and 423,918.20 is: 635,877.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    756,385.40 : 1,134,578.10 = 423,918.20 : x
  2. Step 2: Convert to fraction form
    756,385.40/1,134,578.10 = 423,918.20/x
  3. Step 3: Cross multiply
    756,385.40x = 1,134,578.10 × 423,918.20
  4. Step 4: Simplify right side
    756,385.40x = 480,968,305,911.42
  5. Step 5: Solve for x
    x = 480,968,305,911.42/756,385.40
  6. Step 6: Final answer
    x = 635,877.30

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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.