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Finding the Fourth Proportional to 709,699.30, 979,347.64 and 387,346.84

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Solution

The fourth proportional to 709,699.30, 979,347.64 and 387,346.84 is: 534,518.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    709,699.30 : 979,347.64 = 387,346.84 : x
  2. Step 2: Convert to fraction form
    709,699.30/979,347.64 = 387,346.84/x
  3. Step 3: Cross multiply
    709,699.30x = 979,347.64 × 387,346.84
  4. Step 4: Simplify right side
    709,699.30x = 379,347,213,615.46
  5. Step 5: Solve for x
    x = 379,347,213,615.46/709,699.30
  6. Step 6: Final answer
    x = 534,518.23

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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.