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Finding the Fourth Proportional to 977.34, 1,347.12 and 693.38

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Solution

The fourth proportional to 977.34, 1,347.12 and 693.38 is: 955.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    977.34 : 1,347.12 = 693.38 : x
  2. Step 2: Convert to fraction form
    977.34/1,347.12 = 693.38/x
  3. Step 3: Cross multiply
    977.34x = 1,347.12 × 693.38
  4. Step 4: Simplify right side
    977.34x = 934,066.07
  5. Step 5: Solve for x
    x = 934,066.07/977.34
  6. Step 6: Final answer
    x = 955.72

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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.