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Finding the Fourth Proportional to 710,634.98, 980,678.83 and 388,345.11

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Solution

The fourth proportional to 710,634.98, 980,678.83 and 388,345.11 is: 535,917.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    710,634.98 : 980,678.83 = 388,345.11 : x
  2. Step 2: Convert to fraction form
    710,634.98/980,678.83 = 388,345.11/x
  3. Step 3: Cross multiply
    710,634.98x = 980,678.83 × 388,345.11
  4. Step 4: Simplify right side
    710,634.98x = 380,841,828,111.02
  5. Step 5: Solve for x
    x = 380,841,828,111.02/710,634.98
  6. Step 6: Final answer
    x = 535,917.65

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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.