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Finding the Fourth Proportional to 975.32, 1,345.56 and 555.56

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Solution

The fourth proportional to 975.32, 1,345.56 and 555.56 is: 766.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    975.32 : 1,345.56 = 555.56 : x
  2. Step 2: Convert to fraction form
    975.32/1,345.56 = 555.56/x
  3. Step 3: Cross multiply
    975.32x = 1,345.56 × 555.56
  4. Step 4: Simplify right side
    975.32x = 747,539.31
  5. Step 5: Solve for x
    x = 747,539.31/975.32
  6. Step 6: Final answer
    x = 766.46

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Half scale
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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.