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Finding the Fourth Proportional to 710.59, 1,065.43 and 340.20

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Solution

The fourth proportional to 710.59, 1,065.43 and 340.20 is: 510.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    710.59 : 1,065.43 = 340.20 : x
  2. Step 2: Convert to fraction form
    710.59/1,065.43 = 340.20/x
  3. Step 3: Cross multiply
    710.59x = 1,065.43 × 340.20
  4. Step 4: Simplify right side
    710.59x = 362,459.29
  5. Step 5: Solve for x
    x = 362,459.29/710.59
  6. Step 6: Final answer
    x = 510.08

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.