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Finding the Fourth Proportional to 261,030.70, 391,027.65 and 155,536.30

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Solution

The fourth proportional to 261,030.70, 391,027.65 and 155,536.30 is: 232,995.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    261,030.70 : 391,027.65 = 155,536.30 : x
  2. Step 2: Convert to fraction form
    261,030.70/391,027.65 = 155,536.30/x
  3. Step 3: Cross multiply
    261,030.70x = 391,027.65 × 155,536.30
  4. Step 4: Simplify right side
    261,030.70x = 60,818,993,878.70
  5. Step 5: Solve for x
    x = 60,818,993,878.70/261,030.70
  6. Step 6: Final answer
    x = 232,995.56

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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.