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Finding the Fourth Proportional to 703.16, 1,051.98 and 621.08

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Solution

The fourth proportional to 703.16, 1,051.98 and 621.08 is: 929.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    703.16 : 1,051.98 = 621.08 : x
  2. Step 2: Convert to fraction form
    703.16/1,051.98 = 621.08/x
  3. Step 3: Cross multiply
    703.16x = 1,051.98 × 621.08
  4. Step 4: Simplify right side
    703.16x = 653,363.74
  5. Step 5: Solve for x
    x = 653,363.74/703.16
  6. Step 6: Final answer
    x = 929.18

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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.