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Finding the Fourth Proportional to 975.48, 1,345.56 and 626.36

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Solution

The fourth proportional to 975.48, 1,345.56 and 626.36 is: 863.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    975.48 : 1,345.56 = 626.36 : x
  2. Step 2: Convert to fraction form
    975.48/1,345.56 = 626.36/x
  3. Step 3: Cross multiply
    975.48x = 1,345.56 × 626.36
  4. Step 4: Simplify right side
    975.48x = 842,804.96
  5. Step 5: Solve for x
    x = 842,804.96/975.48
  6. Step 6: Final answer
    x = 863.99

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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.