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Finding the Fourth Proportional to 411,332.80, 616,999.20 and 130,878.40

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Solution

The fourth proportional to 411,332.80, 616,999.20 and 130,878.40 is: 196,317.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    411,332.80 : 616,999.20 = 130,878.40 : x
  2. Step 2: Convert to fraction form
    411,332.80/616,999.20 = 130,878.40/x
  3. Step 3: Cross multiply
    411,332.80x = 616,999.20 × 130,878.40
  4. Step 4: Simplify right side
    411,332.80x = 80,751,868,097.28
  5. Step 5: Solve for x
    x = 80,751,868,097.28/411,332.80
  6. Step 6: Final answer
    x = 196,317.60

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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.