Home / 499,112.12-687,967.80-390,026.87

Finding the Fourth Proportional to 499,112.12, 687,967.80 and 390,026.87

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Solution

The fourth proportional to 499,112.12, 687,967.80 and 390,026.87 is: 537,606.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    499,112.12 : 687,967.80 = 390,026.87 : x
  2. Step 2: Convert to fraction form
    499,112.12/687,967.80 = 390,026.87/x
  3. Step 3: Cross multiply
    499,112.12x = 687,967.80 × 390,026.87
  4. Step 4: Simplify right side
    499,112.12x = 268,325,925,372.23
  5. Step 5: Solve for x
    x = 268,325,925,372.23/499,112.12
  6. Step 6: Final answer
    x = 537,606.51

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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.