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Finding the Fourth Proportional to 959,041.20, 1,439,728.20 and 720,512.40

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Solution

The fourth proportional to 959,041.20, 1,439,728.20 and 720,512.40 is: 1,081,644.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    959,041.20 : 1,439,728.20 = 720,512.40 : x
  2. Step 2: Convert to fraction form
    959,041.20/1,439,728.20 = 720,512.40/x
  3. Step 3: Cross multiply
    959,041.20x = 1,439,728.20 × 720,512.40
  4. Step 4: Simplify right side
    959,041.20x = 1,037,342,020,729.68
  5. Step 5: Solve for x
    x = 1,037,342,020,729.68/959,041.20
  6. Step 6: Final answer
    x = 1,081,644.90

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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.