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Finding the Fourth Proportional to 260,308.70, 390,463.05 and 155,246.30

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Solution

The fourth proportional to 260,308.70, 390,463.05 and 155,246.30 is: 232,869.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    260,308.70 : 390,463.05 = 155,246.30 : x
  2. Step 2: Convert to fraction form
    260,308.70/390,463.05 = 155,246.30/x
  3. Step 3: Cross multiply
    260,308.70x = 390,463.05 × 155,246.30
  4. Step 4: Simplify right side
    260,308.70x = 60,617,943,799.22
  5. Step 5: Solve for x
    x = 60,617,943,799.22/260,308.70
  6. Step 6: Final answer
    x = 232,869.45

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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.