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Finding the Fourth Proportional to 887,643, 1,224,947.38 and 485,235

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Solution

The fourth proportional to 887,643, 1,224,947.38 and 485,235 is: 669,624.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    887,643 : 1,224,947.38 = 485,235 : x
  2. Step 2: Convert to fraction form
    887,643/1,224,947.38 = 485,235/x
  3. Step 3: Cross multiply
    887,643x = 1,224,947.38 × 485,235
  4. Step 4: Simplify right side
    887,643x = 594,387,341,934.30
  5. Step 5: Solve for x
    x = 594,387,341,934.30/887,643
  6. Step 6: Final answer
    x = 669,624.32

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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.