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Finding the Fourth Proportional to 860,265.84, 1,289,557.80 and 387,070.32

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Solution

The fourth proportional to 860,265.84, 1,289,557.80 and 387,070.32 is: 580,227.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    860,265.84 : 1,289,557.80 = 387,070.32 : x
  2. Step 2: Convert to fraction form
    860,265.84/1,289,557.80 = 387,070.32/x
  3. Step 3: Cross multiply
    860,265.84x = 1,289,557.80 × 387,070.32
  4. Step 4: Simplify right side
    860,265.84x = 499,149,550,304.50
  5. Step 5: Solve for x
    x = 499,149,550,304.50/860,265.84
  6. Step 6: Final answer
    x = 580,227.10

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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.