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Finding the Fourth Proportional to 709,770.40, 979,497.98 and 387,494.08

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Solution

The fourth proportional to 709,770.40, 979,497.98 and 387,494.08 is: 534,749.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    709,770.40 : 979,497.98 = 387,494.08 : x
  2. Step 2: Convert to fraction form
    709,770.40/979,497.98 = 387,494.08/x
  3. Step 3: Cross multiply
    709,770.40x = 979,497.98 × 387,494.08
  4. Step 4: Simplify right side
    709,770.40x = 379,549,668,621.96
  5. Step 5: Solve for x
    x = 379,549,668,621.96/709,770.40
  6. Step 6: Final answer
    x = 534,749.93

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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.