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Finding the Fourth Proportional to 710,638.92, 980,684.28 and 388,353.96

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Solution

The fourth proportional to 710,638.92, 980,684.28 and 388,353.96 is: 535,929.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    710,638.92 : 980,684.28 = 388,353.96 : x
  2. Step 2: Convert to fraction form
    710,638.92/980,684.28 = 388,353.96/x
  3. Step 3: Cross multiply
    710,638.92x = 980,684.28 × 388,353.96
  4. Step 4: Simplify right side
    710,638.92x = 380,852,623,647.75
  5. Step 5: Solve for x
    x = 380,852,623,647.75/710,638.92
  6. Step 6: Final answer
    x = 535,929.87

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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.