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Finding the Fourth Proportional to 577,987.40, 866,981.10 and 480,009.80

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Solution

The fourth proportional to 577,987.40, 866,981.10 and 480,009.80 is: 720,014.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    577,987.40 : 866,981.10 = 480,009.80 : x
  2. Step 2: Convert to fraction form
    577,987.40/866,981.10 = 480,009.80/x
  3. Step 3: Cross multiply
    577,987.40x = 866,981.10 × 480,009.80
  4. Step 4: Simplify right side
    577,987.40x = 416,159,424,414.78
  5. Step 5: Solve for x
    x = 416,159,424,414.78/577,987.40
  6. Step 6: Final answer
    x = 720,014.70

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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.