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Finding the Fourth Proportional to 707.51, 1,055.10 and 628.83

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Solution

The fourth proportional to 707.51, 1,055.10 and 628.83 is: 937.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    707.51 : 1,055.10 = 628.83 : x
  2. Step 2: Convert to fraction form
    707.51/1,055.10 = 628.83/x
  3. Step 3: Cross multiply
    707.51x = 1,055.10 × 628.83
  4. Step 4: Simplify right side
    707.51x = 663,478.53
  5. Step 5: Solve for x
    x = 663,478.53/707.51
  6. Step 6: Final answer
    x = 937.77

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.