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Finding the Fourth Proportional to 887,776, 1,225,135.20 and 485,368

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Solution

The fourth proportional to 887,776, 1,225,135.20 and 485,368 is: 669,810.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    887,776 : 1,225,135.20 = 485,368 : x
  2. Step 2: Convert to fraction form
    887,776/1,225,135.20 = 485,368/x
  3. Step 3: Cross multiply
    887,776x = 1,225,135.20 × 485,368
  4. Step 4: Simplify right side
    887,776x = 594,641,421,753.60
  5. Step 5: Solve for x
    x = 594,641,421,753.60/887,776
  6. Step 6: Final answer
    x = 669,810.20

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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.