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Finding the Fourth Proportional to 486,987.89, 672,030.76 and 272,129.72

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Solution

The fourth proportional to 486,987.89, 672,030.76 and 272,129.72 is: 375,532.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    486,987.89 : 672,030.76 = 272,129.72 : x
  2. Step 2: Convert to fraction form
    486,987.89/672,030.76 = 272,129.72/x
  3. Step 3: Cross multiply
    486,987.89x = 672,030.76 × 272,129.72
  4. Step 4: Simplify right side
    486,987.89x = 182,879,542,550.19
  5. Step 5: Solve for x
    x = 182,879,542,550.19/486,987.89
  6. Step 6: Final answer
    x = 375,532.01

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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.