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Finding the Fourth Proportional to 720,040.80, 1,078,894.80 and 615,064.80

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Solution

The fourth proportional to 720,040.80, 1,078,894.80 and 615,064.80 is: 921,600.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    720,040.80 : 1,078,894.80 = 615,064.80 : x
  2. Step 2: Convert to fraction form
    720,040.80/1,078,894.80 = 615,064.80/x
  3. Step 3: Cross multiply
    720,040.80x = 1,078,894.80 × 615,064.80
  4. Step 4: Simplify right side
    720,040.80x = 663,590,214,383.04
  5. Step 5: Solve for x
    x = 663,590,214,383.04/720,040.80
  6. Step 6: Final answer
    x = 921,600.85

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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.