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Finding the Fourth Proportional to 878,470.40, 1,316,830.80 and 404,328.80

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Solution

The fourth proportional to 878,470.40, 1,316,830.80 and 404,328.80 is: 606,090.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    878,470.40 : 1,316,830.80 = 404,328.80 : x
  2. Step 2: Convert to fraction form
    878,470.40/1,316,830.80 = 404,328.80/x
  3. Step 3: Cross multiply
    878,470.40x = 1,316,830.80 × 404,328.80
  4. Step 4: Simplify right side
    878,470.40x = 532,432,617,167.04
  5. Step 5: Solve for x
    x = 532,432,617,167.04/878,470.40
  6. Step 6: Final answer
    x = 606,090.56

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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.