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Finding the Fourth Proportional to 970.01, 1,337.58 and 720.92

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Solution

The fourth proportional to 970.01, 1,337.58 and 720.92 is: 994.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    970.01 : 1,337.58 = 720.92 : x
  2. Step 2: Convert to fraction form
    970.01/1,337.58 = 720.92/x
  3. Step 3: Cross multiply
    970.01x = 1,337.58 × 720.92
  4. Step 4: Simplify right side
    970.01x = 964,288.17
  5. Step 5: Solve for x
    x = 964,288.17/970.01
  6. Step 6: Final answer
    x = 994.10

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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.