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Finding the Fourth Proportional to 640,925.20, 960,120.60 and 562,128.40

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Solution

The fourth proportional to 640,925.20, 960,120.60 and 562,128.40 is: 842,081.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    640,925.20 : 960,120.60 = 562,128.40 : x
  2. Step 2: Convert to fraction form
    640,925.20/960,120.60 = 562,128.40/x
  3. Step 3: Cross multiply
    640,925.20x = 960,120.60 × 562,128.40
  4. Step 4: Simplify right side
    640,925.20x = 539,711,056,685.04
  5. Step 5: Solve for x
    x = 539,711,056,685.04/640,925.20
  6. Step 6: Final answer
    x = 842,081.19

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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.