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Finding the Fourth Proportional to 610,418.40, 915,627.60 and 400,178.40

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Solution

The fourth proportional to 610,418.40, 915,627.60 and 400,178.40 is: 600,267.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    610,418.40 : 915,627.60 = 400,178.40 : x
  2. Step 2: Convert to fraction form
    610,418.40/915,627.60 = 400,178.40/x
  3. Step 3: Cross multiply
    610,418.40x = 915,627.60 × 400,178.40
  4. Step 4: Simplify right side
    610,418.40x = 366,414,387,963.84
  5. Step 5: Solve for x
    x = 366,414,387,963.84/610,418.40
  6. Step 6: Final answer
    x = 600,267.60

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1.5x scale

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.