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Finding the Fourth Proportional to 709,856.67, 979,594.77 and 387,565.77

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Solution

The fourth proportional to 709,856.67, 979,594.77 and 387,565.77 is: 534,836.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    709,856.67 : 979,594.77 = 387,565.77 : x
  2. Step 2: Convert to fraction form
    709,856.67/979,594.77 = 387,565.77/x
  3. Step 3: Cross multiply
    709,856.67x = 979,594.77 × 387,565.77
  4. Step 4: Simplify right side
    709,856.67x = 379,657,401,323.02
  5. Step 5: Solve for x
    x = 379,657,401,323.02/709,856.67
  6. Step 6: Final answer
    x = 534,836.70

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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.