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Finding the Fourth Proportional to 386,987.04, 534,037.68 and 217,216.80

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Solution

The fourth proportional to 386,987.04, 534,037.68 and 217,216.80 is: 299,756.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    386,987.04 : 534,037.68 = 217,216.80 : x
  2. Step 2: Convert to fraction form
    386,987.04/534,037.68 = 217,216.80/x
  3. Step 3: Cross multiply
    386,987.04x = 534,037.68 × 217,216.80
  4. Step 4: Simplify right side
    386,987.04x = 116,001,955,929.02
  5. Step 5: Solve for x
    x = 116,001,955,929.02/386,987.04
  6. Step 6: Final answer
    x = 299,756.69

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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.