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Finding the Fourth Proportional to 1,089.04, 1,502.80 and 646.76

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Solution

The fourth proportional to 1,089.04, 1,502.80 and 646.76 is: 892.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,089.04 : 1,502.80 = 646.76 : x
  2. Step 2: Convert to fraction form
    1,089.04/1,502.80 = 646.76/x
  3. Step 3: Cross multiply
    1,089.04x = 1,502.80 × 646.76
  4. Step 4: Simplify right side
    1,089.04x = 971,950.93
  5. Step 5: Solve for x
    x = 971,950.93/1,089.04
  6. Step 6: Final answer
    x = 892.48

Related Problems

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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.