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Finding the Fourth Proportional to 285,412.71, 393,864.62 and 158,085.57

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Solution

The fourth proportional to 285,412.71, 393,864.62 and 158,085.57 is: 218,155.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    285,412.71 : 393,864.62 = 158,085.57 : x
  2. Step 2: Convert to fraction form
    285,412.71/393,864.62 = 158,085.57/x
  3. Step 3: Cross multiply
    285,412.71x = 393,864.62 × 158,085.57
  4. Step 4: Simplify right side
    285,412.71x = 62,264,312,165.11
  5. Step 5: Solve for x
    x = 62,264,312,165.11/285,412.71
  6. Step 6: Final answer
    x = 218,155.36

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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.