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Finding the Fourth Proportional to 545,378.12, 752,612.80 and 319,061.96

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Solution

The fourth proportional to 545,378.12, 752,612.80 and 319,061.96 is: 440,300.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    545,378.12 : 752,612.80 = 319,061.96 : x
  2. Step 2: Convert to fraction form
    545,378.12/752,612.80 = 319,061.96/x
  3. Step 3: Cross multiply
    545,378.12x = 752,612.80 × 319,061.96
  4. Step 4: Simplify right side
    545,378.12x = 240,130,115,089.09
  5. Step 5: Solve for x
    x = 240,130,115,089.09/545,378.12
  6. Step 6: Final answer
    x = 440,300.24

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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.