Home / 721,140-1,079,495.64-453,648.06

Finding the Fourth Proportional to 721,140, 1,079,495.64 and 453,648.06

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Solution

The fourth proportional to 721,140, 1,079,495.64 and 453,648.06 is: 679,079.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    721,140 : 1,079,495.64 = 453,648.06 : x
  2. Step 2: Convert to fraction form
    721,140/1,079,495.64 = 453,648.06/x
  3. Step 3: Cross multiply
    721,140x = 1,079,495.64 × 453,648.06
  4. Step 4: Simplify right side
    721,140x = 489,711,102,864.46
  5. Step 5: Solve for x
    x = 489,711,102,864.46/721,140
  6. Step 6: Final answer
    x = 679,079.10

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.