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Finding the Fourth Proportional to 285,279.70, 393,686.01 and 157,955.29

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Solution

The fourth proportional to 285,279.70, 393,686.01 and 157,955.29 is: 217,978.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    285,279.70 : 393,686.01 = 157,955.29 : x
  2. Step 2: Convert to fraction form
    285,279.70/393,686.01 = 157,955.29/x
  3. Step 3: Cross multiply
    285,279.70x = 393,686.01 × 157,955.29
  4. Step 4: Simplify right side
    285,279.70x = 62,184,787,779.40
  5. Step 5: Solve for x
    x = 62,184,787,779.40/285,279.70
  6. Step 6: Final answer
    x = 217,978.32

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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.