Home / 642,821.47-887,088.71-352,429.58

Finding the Fourth Proportional to 642,821.47, 887,088.71 and 352,429.58

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Solution

The fourth proportional to 642,821.47, 887,088.71 and 352,429.58 is: 486,350.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    642,821.47 : 887,088.71 = 352,429.58 : x
  2. Step 2: Convert to fraction form
    642,821.47/887,088.71 = 352,429.58/x
  3. Step 3: Cross multiply
    642,821.47x = 887,088.71 × 352,429.58
  4. Step 4: Simplify right side
    642,821.47x = 312,636,304,586.84
  5. Step 5: Solve for x
    x = 312,636,304,586.84/642,821.47
  6. Step 6: Final answer
    x = 486,350.13

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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.