Home / 642,828.02-887,043-356,323.72

Finding the Fourth Proportional to 642,828.02, 887,043 and 356,323.72

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Solution

The fourth proportional to 642,828.02, 887,043 and 356,323.72 is: 491,693.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    642,828.02 : 887,043 = 356,323.72 : x
  2. Step 2: Convert to fraction form
    642,828.02/887,043 = 356,323.72/x
  3. Step 3: Cross multiply
    642,828.02x = 887,043 × 356,323.72
  4. Step 4: Simplify right side
    642,828.02x = 316,074,461,559.96
  5. Step 5: Solve for x
    x = 316,074,461,559.96/642,828.02
  6. Step 6: Final answer
    x = 491,693.66

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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.