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Finding the Fourth Proportional to 720,017.70, 1,080,026.55 and 521,729.70

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Solution

The fourth proportional to 720,017.70, 1,080,026.55 and 521,729.70 is: 782,594.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    720,017.70 : 1,080,026.55 = 521,729.70 : x
  2. Step 2: Convert to fraction form
    720,017.70/1,080,026.55 = 521,729.70/x
  3. Step 3: Cross multiply
    720,017.70x = 1,080,026.55 × 521,729.70
  4. Step 4: Simplify right side
    720,017.70x = 563,481,927,923.54
  5. Step 5: Solve for x
    x = 563,481,927,923.54/720,017.70
  6. Step 6: Final answer
    x = 782,594.55

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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.