Home / 638,386.79-880,964.24-351,900.72

Finding the Fourth Proportional to 638,386.79, 880,964.24 and 351,900.72

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Solution

The fourth proportional to 638,386.79, 880,964.24 and 351,900.72 is: 485,617.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    638,386.79 : 880,964.24 = 351,900.72 : x
  2. Step 2: Convert to fraction form
    638,386.79/880,964.24 = 351,900.72/x
  3. Step 3: Cross multiply
    638,386.79x = 880,964.24 × 351,900.72
  4. Step 4: Simplify right side
    638,386.79x = 310,011,948,590.75
  5. Step 5: Solve for x
    x = 310,011,948,590.75/638,386.79
  6. Step 6: Final answer
    x = 485,617.74

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1.5x scale

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.