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Finding the Fourth Proportional to 638,209.37, 880,386.82 and 408,519.53

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Solution

The fourth proportional to 638,209.37, 880,386.82 and 408,519.53 is: 563,537.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    638,209.37 : 880,386.82 = 408,519.53 : x
  2. Step 2: Convert to fraction form
    638,209.37/880,386.82 = 408,519.53/x
  3. Step 3: Cross multiply
    638,209.37x = 880,386.82 × 408,519.53
  4. Step 4: Simplify right side
    638,209.37x = 359,655,207,802.81
  5. Step 5: Solve for x
    x = 359,655,207,802.81/638,209.37
  6. Step 6: Final answer
    x = 563,537.96

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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.