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Finding the Fourth Proportional to 638,870.10, 881,641.48 and 366,990.65

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Solution

The fourth proportional to 638,870.10, 881,641.48 and 366,990.65 is: 506,447.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    638,870.10 : 881,641.48 = 366,990.65 : x
  2. Step 2: Convert to fraction form
    638,870.10/881,641.48 = 366,990.65/x
  3. Step 3: Cross multiply
    638,870.10x = 881,641.48 × 366,990.65
  4. Step 4: Simplify right side
    638,870.10x = 323,554,179,812.16
  5. Step 5: Solve for x
    x = 323,554,179,812.16/638,870.10
  6. Step 6: Final answer
    x = 506,447.52

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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.