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Finding the Fourth Proportional to 285,312.35, 393,730.76 and 157,987.94

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Solution

The fourth proportional to 285,312.35, 393,730.76 and 157,987.94 is: 218,023.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    285,312.35 : 393,730.76 = 157,987.94 : x
  2. Step 2: Convert to fraction form
    285,312.35/393,730.76 = 157,987.94/x
  3. Step 3: Cross multiply
    285,312.35x = 393,730.76 × 157,987.94
  4. Step 4: Simplify right side
    285,312.35x = 62,204,708,928.44
  5. Step 5: Solve for x
    x = 62,204,708,928.44/285,312.35
  6. Step 6: Final answer
    x = 218,023.19

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1.5x scale

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.