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Finding the Fourth Proportional to 638,894.88, 881,643.15 and 352,407.60

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Solution

The fourth proportional to 638,894.88, 881,643.15 and 352,407.60 is: 486,304.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    638,894.88 : 881,643.15 = 352,407.60 : x
  2. Step 2: Convert to fraction form
    638,894.88/881,643.15 = 352,407.60/x
  3. Step 3: Cross multiply
    638,894.88x = 881,643.15 × 352,407.60
  4. Step 4: Simplify right side
    638,894.88x = 310,697,746,547.94
  5. Step 5: Solve for x
    x = 310,697,746,547.94/638,894.88
  6. Step 6: Final answer
    x = 486,304.96

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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.