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Finding the Fourth Proportional to 878,462.40, 1,316,818.80 and 404,320.80

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Solution

The fourth proportional to 878,462.40, 1,316,818.80 and 404,320.80 is: 606,078.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    878,462.40 : 1,316,818.80 = 404,320.80 : x
  2. Step 2: Convert to fraction form
    878,462.40/1,316,818.80 = 404,320.80/x
  3. Step 3: Cross multiply
    878,462.40x = 1,316,818.80 × 404,320.80
  4. Step 4: Simplify right side
    878,462.40x = 532,417,230,671.04
  5. Step 5: Solve for x
    x = 532,417,230,671.04/878,462.40
  6. Step 6: Final answer
    x = 606,078.56

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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.