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Finding the Fourth Proportional to 978.04, 1,465.02 and 586.80

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Solution

The fourth proportional to 978.04, 1,465.02 and 586.80 is: 878.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    978.04 : 1,465.02 = 586.80 : x
  2. Step 2: Convert to fraction form
    978.04/1,465.02 = 586.80/x
  3. Step 3: Cross multiply
    978.04x = 1,465.02 × 586.80
  4. Step 4: Simplify right side
    978.04x = 859,673.74
  5. Step 5: Solve for x
    x = 859,673.74/978.04
  6. Step 6: Final answer
    x = 878.98

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.