Home / 688,443.53-949,779.93-398,001.65

Finding the Fourth Proportional to 688,443.53, 949,779.93 and 398,001.65

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Solution

The fourth proportional to 688,443.53, 949,779.93 and 398,001.65 is: 549,084.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    688,443.53 : 949,779.93 = 398,001.65 : x
  2. Step 2: Convert to fraction form
    688,443.53/949,779.93 = 398,001.65/x
  3. Step 3: Cross multiply
    688,443.53x = 949,779.93 × 398,001.65
  4. Step 4: Simplify right side
    688,443.53x = 378,013,979,124.24
  5. Step 5: Solve for x
    x = 378,013,979,124.24/688,443.53
  6. Step 6: Final answer
    x = 549,084.95

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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.