Home / 869,421.40-1,304,132.10-270,420.40

Finding the Fourth Proportional to 869,421.40, 1,304,132.10 and 270,420.40

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Solution

The fourth proportional to 869,421.40, 1,304,132.10 and 270,420.40 is: 405,630.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    869,421.40 : 1,304,132.10 = 270,420.40 : x
  2. Step 2: Convert to fraction form
    869,421.40/1,304,132.10 = 270,420.40/x
  3. Step 3: Cross multiply
    869,421.40x = 1,304,132.10 × 270,420.40
  4. Step 4: Simplify right side
    869,421.40x = 352,663,924,134.84
  5. Step 5: Solve for x
    x = 352,663,924,134.84/869,421.40
  6. Step 6: Final answer
    x = 405,630.60

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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.