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Finding the Fourth Proportional to 556,913.52, 768,357.72 and 315,172.08

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Solution

The fourth proportional to 556,913.52, 768,357.72 and 315,172.08 is: 434,833.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    556,913.52 : 768,357.72 = 315,172.08 : x
  2. Step 2: Convert to fraction form
    556,913.52/768,357.72 = 315,172.08/x
  3. Step 3: Cross multiply
    556,913.52x = 768,357.72 × 315,172.08
  4. Step 4: Simplify right side
    556,913.52x = 242,164,900,796.46
  5. Step 5: Solve for x
    x = 242,164,900,796.46/556,913.52
  6. Step 6: Final answer
    x = 434,833.94

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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.