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Finding the Fourth Proportional to 386,417.00, 579,441.42 and 143,178.86

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Solution

The fourth proportional to 386,417.00, 579,441.42 and 143,178.86 is: 214,700.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    386,417.00 : 579,441.42 = 143,178.86 : x
  2. Step 2: Convert to fraction form
    386,417.00/579,441.42 = 143,178.86/x
  3. Step 3: Cross multiply
    386,417.00x = 579,441.42 × 143,178.86
  4. Step 4: Simplify right side
    386,417.00x = 82,963,759,055.17
  5. Step 5: Solve for x
    x = 82,963,759,055.17/386,417.00
  6. Step 6: Final answer
    x = 214,700.08

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.