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Finding the Fourth Proportional to 709,763.16, 979,487.98 and 387,486.84

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Solution

The fourth proportional to 709,763.16, 979,487.98 and 387,486.84 is: 534,739.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    709,763.16 : 979,487.98 = 387,486.84 : x
  2. Step 2: Convert to fraction form
    709,763.16/979,487.98 = 387,486.84/x
  3. Step 3: Cross multiply
    709,763.16x = 979,487.98 × 387,486.84
  4. Step 4: Simplify right side
    709,763.16x = 379,538,702,188.18
  5. Step 5: Solve for x
    x = 379,538,702,188.18/709,763.16
  6. Step 6: Final answer
    x = 534,739.93

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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.