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Finding the Fourth Proportional to 713,085.72, 984,069.18 and 390,793.20

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Solution

The fourth proportional to 713,085.72, 984,069.18 and 390,793.20 is: 539,300.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    713,085.72 : 984,069.18 = 390,793.20 : x
  2. Step 2: Convert to fraction form
    713,085.72/984,069.18 = 390,793.20/x
  3. Step 3: Cross multiply
    713,085.72x = 984,069.18 × 390,793.20
  4. Step 4: Simplify right side
    713,085.72x = 384,567,543,873.58
  5. Step 5: Solve for x
    x = 384,567,543,873.58/713,085.72
  6. Step 6: Final answer
    x = 539,300.58

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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.