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Finding the Fourth Proportional to 710,385.06, 980,398.92 and 388,143.54

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Solution

The fourth proportional to 710,385.06, 980,398.92 and 388,143.54 is: 535,674.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    710,385.06 : 980,398.92 = 388,143.54 : x
  2. Step 2: Convert to fraction form
    710,385.06/980,398.92 = 388,143.54/x
  3. Step 3: Cross multiply
    710,385.06x = 980,398.92 × 388,143.54
  4. Step 4: Simplify right side
    710,385.06x = 380,535,507,420.98
  5. Step 5: Solve for x
    x = 380,535,507,420.98/710,385.06
  6. Step 6: Final answer
    x = 535,674.99

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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.