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Finding the Fourth Proportional to 768,672.40, 1,060,865.76 and 446,318.32

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Solution

The fourth proportional to 768,672.40, 1,060,865.76 and 446,318.32 is: 615,976.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    768,672.40 : 1,060,865.76 = 446,318.32 : x
  2. Step 2: Convert to fraction form
    768,672.40/1,060,865.76 = 446,318.32/x
  3. Step 3: Cross multiply
    768,672.40x = 1,060,865.76 × 446,318.32
  4. Step 4: Simplify right side
    768,672.40x = 473,483,823,748.72
  5. Step 5: Solve for x
    x = 473,483,823,748.72/768,672.40
  6. Step 6: Final answer
    x = 615,976.10

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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.