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Finding the Fourth Proportional to 297,988.40, 447,061.80 and 129,436.40

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Solution

The fourth proportional to 297,988.40, 447,061.80 and 129,436.40 is: 194,189.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    297,988.40 : 447,061.80 = 129,436.40 : x
  2. Step 2: Convert to fraction form
    297,988.40/447,061.80 = 129,436.40/x
  3. Step 3: Cross multiply
    297,988.40x = 447,061.80 × 129,436.40
  4. Step 4: Simplify right side
    297,988.40x = 57,866,069,969.52
  5. Step 5: Solve for x
    x = 57,866,069,969.52/297,988.40
  6. Step 6: Final answer
    x = 194,189.00

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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.