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Finding the Fourth Proportional to 487,685.48, 672,978.84 and 272,784.08

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Solution

The fourth proportional to 487,685.48, 672,978.84 and 272,784.08 is: 376,426.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    487,685.48 : 672,978.84 = 272,784.08 : x
  2. Step 2: Convert to fraction form
    487,685.48/672,978.84 = 272,784.08/x
  3. Step 3: Cross multiply
    487,685.48x = 672,978.84 × 272,784.08
  4. Step 4: Simplify right side
    487,685.48x = 183,577,913,728.87
  5. Step 5: Solve for x
    x = 183,577,913,728.87/487,685.48
  6. Step 6: Final answer
    x = 376,426.86

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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.