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Finding the Fourth Proportional to 261,855.20, 391,875.60 and 156,749.60

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Solution

The fourth proportional to 261,855.20, 391,875.60 and 156,749.60 is: 234,581.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    261,855.20 : 391,875.60 = 156,749.60 : x
  2. Step 2: Convert to fraction form
    261,855.20/391,875.60 = 156,749.60/x
  3. Step 3: Cross multiply
    261,855.20x = 391,875.60 × 156,749.60
  4. Step 4: Simplify right side
    261,855.20x = 61,426,343,549.76
  5. Step 5: Solve for x
    x = 61,426,343,549.76/261,855.20
  6. Step 6: Final answer
    x = 234,581.34

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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.