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Finding the Fourth Proportional to 331,378.40, 457,307.40 and 180,475.28

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Solution

The fourth proportional to 331,378.40, 457,307.40 and 180,475.28 is: 249,058.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    331,378.40 : 457,307.40 = 180,475.28 : x
  2. Step 2: Convert to fraction form
    331,378.40/457,307.40 = 180,475.28/x
  3. Step 3: Cross multiply
    331,378.40x = 457,307.40 × 180,475.28
  4. Step 4: Simplify right side
    331,378.40x = 82,532,681,061.07
  5. Step 5: Solve for x
    x = 82,532,681,061.07/331,378.40
  6. Step 6: Final answer
    x = 249,058.72

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.