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Finding the Fourth Proportional to 260,061.90, 390,092.85 and 171,488.40

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Solution

The fourth proportional to 260,061.90, 390,092.85 and 171,488.40 is: 257,232.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    260,061.90 : 390,092.85 = 171,488.40 : x
  2. Step 2: Convert to fraction form
    260,061.90/390,092.85 = 171,488.40/x
  3. Step 3: Cross multiply
    260,061.90x = 390,092.85 × 171,488.40
  4. Step 4: Simplify right side
    260,061.90x = 66,896,398,697.94
  5. Step 5: Solve for x
    x = 66,896,398,697.94/260,061.90
  6. Step 6: Final answer
    x = 257,232.60

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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.