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Finding the Fourth Proportional to 545,613.72, 752,949.18 and 319,215.48

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Solution

The fourth proportional to 545,613.72, 752,949.18 and 319,215.48 is: 440,518.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    545,613.72 : 752,949.18 = 319,215.48 : x
  2. Step 2: Convert to fraction form
    545,613.72/752,949.18 = 319,215.48/x
  3. Step 3: Cross multiply
    545,613.72x = 752,949.18 × 319,215.48
  4. Step 4: Simplify right side
    545,613.72x = 240,353,033,909.31
  5. Step 5: Solve for x
    x = 240,353,033,909.31/545,613.72
  6. Step 6: Final answer
    x = 440,518.68

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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.