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Finding the Fourth Proportional to 511,547.76, 705,711.96 and 487,830.96

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Solution

The fourth proportional to 511,547.76, 705,711.96 and 487,830.96 is: 672,993.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    511,547.76 : 705,711.96 = 487,830.96 : x
  2. Step 2: Convert to fraction form
    511,547.76/705,711.96 = 487,830.96/x
  3. Step 3: Cross multiply
    511,547.76x = 705,711.96 × 487,830.96
  4. Step 4: Simplify right side
    511,547.76x = 344,268,142,930.28
  5. Step 5: Solve for x
    x = 344,268,142,930.28/511,547.76
  6. Step 6: Final answer
    x = 672,993.16

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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.