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Finding the Fourth Proportional to 928,278, 1,281,023.64 and 525,870

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Solution

The fourth proportional to 928,278, 1,281,023.64 and 525,870 is: 725,700.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    928,278 : 1,281,023.64 = 525,870 : x
  2. Step 2: Convert to fraction form
    928,278/1,281,023.64 = 525,870/x
  3. Step 3: Cross multiply
    928,278x = 1,281,023.64 × 525,870
  4. Step 4: Simplify right side
    928,278x = 673,651,901,566.80
  5. Step 5: Solve for x
    x = 673,651,901,566.80/928,278
  6. Step 6: Final answer
    x = 725,700.60

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.