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Finding the Fourth Proportional to 710,069.81, 979,891.16 and 387,779.81

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Solution

The fourth proportional to 710,069.81, 979,891.16 and 387,779.81 is: 535,133.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    710,069.81 : 979,891.16 = 387,779.81 : x
  2. Step 2: Convert to fraction form
    710,069.81/979,891.16 = 387,779.81/x
  3. Step 3: Cross multiply
    710,069.81x = 979,891.16 × 387,779.81
  4. Step 4: Simplify right side
    710,069.81x = 379,982,001,007.13
  5. Step 5: Solve for x
    x = 379,982,001,007.13/710,069.81
  6. Step 6: Final answer
    x = 535,133.30

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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.