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Finding the Fourth Proportional to 970.07, 1,337.76 and 638.16

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Solution

The fourth proportional to 970.07, 1,337.76 and 638.16 is: 880.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    970.07 : 1,337.76 = 638.16 : x
  2. Step 2: Convert to fraction form
    970.07/1,337.76 = 638.16/x
  3. Step 3: Cross multiply
    970.07x = 1,337.76 × 638.16
  4. Step 4: Simplify right side
    970.07x = 853,704.92
  5. Step 5: Solve for x
    x = 853,704.92/970.07
  6. Step 6: Final answer
    x = 880.05

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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.