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Finding the Fourth Proportional to 261,003.60, 390,727.80 and 155,768.40

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Solution

The fourth proportional to 261,003.60, 390,727.80 and 155,768.40 is: 233,188.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    261,003.60 : 390,727.80 = 155,768.40 : x
  2. Step 2: Convert to fraction form
    261,003.60/390,727.80 = 155,768.40/x
  3. Step 3: Cross multiply
    261,003.60x = 390,727.80 × 155,768.40
  4. Step 4: Simplify right side
    261,003.60x = 60,863,044,241.52
  5. Step 5: Solve for x
    x = 60,863,044,241.52/261,003.60
  6. Step 6: Final answer
    x = 233,188.52

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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.