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Finding the Fourth Proportional to 975.14, 1,345.40 and 555.36

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Solution

The fourth proportional to 975.14, 1,345.40 and 555.36 is: 766.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    975.14 : 1,345.40 = 555.36 : x
  2. Step 2: Convert to fraction form
    975.14/1,345.40 = 555.36/x
  3. Step 3: Cross multiply
    975.14x = 1,345.40 × 555.36
  4. Step 4: Simplify right side
    975.14x = 747,181.34
  5. Step 5: Solve for x
    x = 747,181.34/975.14
  6. Step 6: Final answer
    x = 766.23

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Double scale
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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.