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Finding the Fourth Proportional to 710,718.71, 980,793.56 and 388,432.67

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Solution

The fourth proportional to 710,718.71, 980,793.56 and 388,432.67 is: 536,038.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    710,718.71 : 980,793.56 = 388,432.67 : x
  2. Step 2: Convert to fraction form
    710,718.71/980,793.56 = 388,432.67/x
  3. Step 3: Cross multiply
    710,718.71x = 980,793.56 × 388,432.67
  4. Step 4: Simplify right side
    710,718.71x = 380,972,257,296.72
  5. Step 5: Solve for x
    x = 380,972,257,296.72/710,718.71
  6. Step 6: Final answer
    x = 536,038.03

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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.