Home / 665,066.10-917,462.38-393,002.40

Finding the Fourth Proportional to 665,066.10, 917,462.38 and 393,002.40

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Solution

The fourth proportional to 665,066.10, 917,462.38 and 393,002.40 is: 542,148.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    665,066.10 : 917,462.38 = 393,002.40 : x
  2. Step 2: Convert to fraction form
    665,066.10/917,462.38 = 393,002.40/x
  3. Step 3: Cross multiply
    665,066.10x = 917,462.38 × 393,002.40
  4. Step 4: Simplify right side
    665,066.10x = 360,564,917,249.71
  5. Step 5: Solve for x
    x = 360,564,917,249.71/665,066.10
  6. Step 6: Final answer
    x = 542,148.99

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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.