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Finding the Fourth Proportional to 716,077.84, 988,193.66 and 389,391.88

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Solution

The fourth proportional to 716,077.84, 988,193.66 and 389,391.88 is: 537,364.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    716,077.84 : 988,193.66 = 389,391.88 : x
  2. Step 2: Convert to fraction form
    716,077.84/988,193.66 = 389,391.88/x
  3. Step 3: Cross multiply
    716,077.84x = 988,193.66 × 389,391.88
  4. Step 4: Simplify right side
    716,077.84x = 384,794,587,071.48
  5. Step 5: Solve for x
    x = 384,794,587,071.48/716,077.84
  6. Step 6: Final answer
    x = 537,364.19

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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.