Home / 287,621.40-431,432.10-147,653.40

Finding the Fourth Proportional to 287,621.40, 431,432.10 and 147,653.40

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Solution

The fourth proportional to 287,621.40, 431,432.10 and 147,653.40 is: 221,480.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    287,621.40 : 431,432.10 = 147,653.40 : x
  2. Step 2: Convert to fraction form
    287,621.40/431,432.10 = 147,653.40/x
  3. Step 3: Cross multiply
    287,621.40x = 431,432.10 × 147,653.40
  4. Step 4: Simplify right side
    287,621.40x = 63,702,416,434.14
  5. Step 5: Solve for x
    x = 63,702,416,434.14/287,621.40
  6. Step 6: Final answer
    x = 221,480.10

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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.