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Finding the Fourth Proportional to 707.19, 1,055.55 and 626.10

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Solution

The fourth proportional to 707.19, 1,055.55 and 626.10 is: 934.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    707.19 : 1,055.55 = 626.10 : x
  2. Step 2: Convert to fraction form
    707.19/1,055.55 = 626.10/x
  3. Step 3: Cross multiply
    707.19x = 1,055.55 × 626.10
  4. Step 4: Simplify right side
    707.19x = 660,879.86
  5. Step 5: Solve for x
    x = 660,879.86/707.19
  6. Step 6: Final answer
    x = 934.52

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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.