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Finding the Fourth Proportional to 710,069.88, 979,904.22 and 387,789.48

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Solution

The fourth proportional to 710,069.88, 979,904.22 and 387,789.48 is: 535,153.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    710,069.88 : 979,904.22 = 387,789.48 : x
  2. Step 2: Convert to fraction form
    710,069.88/979,904.22 = 387,789.48/x
  3. Step 3: Cross multiply
    710,069.88x = 979,904.22 × 387,789.48
  4. Step 4: Simplify right side
    710,069.88x = 379,996,547,923.61
  5. Step 5: Solve for x
    x = 379,996,547,923.61/710,069.88
  6. Step 6: Final answer
    x = 535,153.73

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1.5x scale

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.