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Finding the Fourth Proportional to 975.07, 1,345.55 and 555.36

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Solution

The fourth proportional to 975.07, 1,345.55 and 555.36 is: 766.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    975.07 : 1,345.55 = 555.36 : x
  2. Step 2: Convert to fraction form
    975.07/1,345.55 = 555.36/x
  3. Step 3: Cross multiply
    975.07x = 1,345.55 × 555.36
  4. Step 4: Simplify right side
    975.07x = 747,255.14
  5. Step 5: Solve for x
    x = 747,255.14/975.07
  6. Step 6: Final answer
    x = 766.36

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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.