Home / 662,115.04-913,644.32-390,165.28

Finding the Fourth Proportional to 662,115.04, 913,644.32 and 390,165.28

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Solution

The fourth proportional to 662,115.04, 913,644.32 and 390,165.28 is: 538,384.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    662,115.04 : 913,644.32 = 390,165.28 : x
  2. Step 2: Convert to fraction form
    662,115.04/913,644.32 = 390,165.28/x
  3. Step 3: Cross multiply
    662,115.04x = 913,644.32 × 390,165.28
  4. Step 4: Simplify right side
    662,115.04x = 356,472,291,933.21
  5. Step 5: Solve for x
    x = 356,472,291,933.21/662,115.04
  6. Step 6: Final answer
    x = 538,384.22

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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.