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Finding the Fourth Proportional to 319,505.45, 440,919 and 176,265.45

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Solution

The fourth proportional to 319,505.45, 440,919 and 176,265.45 is: 243,247.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    319,505.45 : 440,919 = 176,265.45 : x
  2. Step 2: Convert to fraction form
    319,505.45/440,919 = 176,265.45/x
  3. Step 3: Cross multiply
    319,505.45x = 440,919 × 176,265.45
  4. Step 4: Simplify right side
    319,505.45x = 77,718,785,948.55
  5. Step 5: Solve for x
    x = 77,718,785,948.55/319,505.45
  6. Step 6: Final answer
    x = 243,247.14

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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.