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Finding the Fourth Proportional to 710,731.56, 980,807.18 and 388,441.56

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Solution

The fourth proportional to 710,731.56, 980,807.18 and 388,441.56 is: 536,048.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    710,731.56 : 980,807.18 = 388,441.56 : x
  2. Step 2: Convert to fraction form
    710,731.56/980,807.18 = 388,441.56/x
  3. Step 3: Cross multiply
    710,731.56x = 980,807.18 × 388,441.56
  4. Step 4: Simplify right side
    710,731.56x = 380,986,271,058.40
  5. Step 5: Solve for x
    x = 380,986,271,058.40/710,731.56
  6. Step 6: Final answer
    x = 536,048.06

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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.