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Finding the Fourth Proportional to 768,711.76, 1,153,279.02 and 369,686.32

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Solution

The fourth proportional to 768,711.76, 1,153,279.02 and 369,686.32 is: 554,631.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    768,711.76 : 1,153,279.02 = 369,686.32 : x
  2. Step 2: Convert to fraction form
    768,711.76/1,153,279.02 = 369,686.32/x
  3. Step 3: Cross multiply
    768,711.76x = 1,153,279.02 × 369,686.32
  4. Step 4: Simplify right side
    768,711.76x = 426,351,476,837.01
  5. Step 5: Solve for x
    x = 426,351,476,837.01/768,711.76
  6. Step 6: Final answer
    x = 554,631.14

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.