Home / 457,905.40-686,858.10-142,394.20

Finding the Fourth Proportional to 457,905.40, 686,858.10 and 142,394.20

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Solution

The fourth proportional to 457,905.40, 686,858.10 and 142,394.20 is: 213,591.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    457,905.40 : 686,858.10 = 142,394.20 : x
  2. Step 2: Convert to fraction form
    457,905.40/686,858.10 = 142,394.20/x
  3. Step 3: Cross multiply
    457,905.40x = 686,858.10 × 142,394.20
  4. Step 4: Simplify right side
    457,905.40x = 97,804,609,663.02
  5. Step 5: Solve for x
    x = 97,804,609,663.02/457,905.40
  6. Step 6: Final answer
    x = 213,591.30

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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.