Home / 869,939.40-1,304,909.10-309,030.60

Finding the Fourth Proportional to 869,939.40, 1,304,909.10 and 309,030.60

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Solution

The fourth proportional to 869,939.40, 1,304,909.10 and 309,030.60 is: 463,545.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    869,939.40 : 1,304,909.10 = 309,030.60 : x
  2. Step 2: Convert to fraction form
    869,939.40/1,304,909.10 = 309,030.60/x
  3. Step 3: Cross multiply
    869,939.40x = 1,304,909.10 × 309,030.60
  4. Step 4: Simplify right side
    869,939.40x = 403,256,842,118.46
  5. Step 5: Solve for x
    x = 403,256,842,118.46/869,939.40
  6. Step 6: Final answer
    x = 463,545.90

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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.