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Finding the Fourth Proportional to 261,032.70, 391,030.65 and 155,538.30

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Solution

The fourth proportional to 261,032.70, 391,030.65 and 155,538.30 is: 232,998.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    261,032.70 : 391,030.65 = 155,538.30 : x
  2. Step 2: Convert to fraction form
    261,032.70/391,030.65 = 155,538.30/x
  3. Step 3: Cross multiply
    261,032.70x = 391,030.65 × 155,538.30
  4. Step 4: Simplify right side
    261,032.70x = 60,820,242,548.90
  5. Step 5: Solve for x
    x = 60,820,242,548.90/261,032.70
  6. Step 6: Final answer
    x = 232,998.56

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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.