Home / 716,787.72-989,148.84-390,086.85

Finding the Fourth Proportional to 716,787.72, 989,148.84 and 390,086.85

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Solution

The fourth proportional to 716,787.72, 989,148.84 and 390,086.85 is: 538,309.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    716,787.72 : 989,148.84 = 390,086.85 : x
  2. Step 2: Convert to fraction form
    716,787.72/989,148.84 = 390,086.85/x
  3. Step 3: Cross multiply
    716,787.72x = 989,148.84 × 390,086.85
  4. Step 4: Simplify right side
    716,787.72x = 385,853,955,176.75
  5. Step 5: Solve for x
    x = 385,853,955,176.75/716,787.72
  6. Step 6: Final answer
    x = 538,309.94

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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.