Home / 287,724.89-431,853.53-145,670.00

Finding the Fourth Proportional to 287,724.89, 431,853.53 and 145,670.00

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Solution

The fourth proportional to 287,724.89, 431,853.53 and 145,670.00 is: 218,639.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    287,724.89 : 431,853.53 = 145,670.00 : x
  2. Step 2: Convert to fraction form
    287,724.89/431,853.53 = 145,670.00/x
  3. Step 3: Cross multiply
    287,724.89x = 431,853.53 × 145,670.00
  4. Step 4: Simplify right side
    287,724.89x = 62,908,100,827.48
  5. Step 5: Solve for x
    x = 62,908,100,827.48/287,724.89
  6. Step 6: Final answer
    x = 218,639.76

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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.