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Finding the Fourth Proportional to 709,418.77, 979,018.58 and 387,149.62

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Solution

The fourth proportional to 709,418.77, 979,018.58 and 387,149.62 is: 534,277.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    709,418.77 : 979,018.58 = 387,149.62 : x
  2. Step 2: Convert to fraction form
    709,418.77/979,018.58 = 387,149.62/x
  3. Step 3: Cross multiply
    709,418.77x = 979,018.58 × 387,149.62
  4. Step 4: Simplify right side
    709,418.77x = 379,026,671,219.94
  5. Step 5: Solve for x
    x = 379,026,671,219.94/709,418.77
  6. Step 6: Final answer
    x = 534,277.76

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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.