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Finding the Fourth Proportional to 987.48, 1,482.59 and 500.87

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Solution

The fourth proportional to 987.48, 1,482.59 and 500.87 is: 752.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    987.48 : 1,482.59 = 500.87 : x
  2. Step 2: Convert to fraction form
    987.48/1,482.59 = 500.87/x
  3. Step 3: Cross multiply
    987.48x = 1,482.59 × 500.87
  4. Step 4: Simplify right side
    987.48x = 742,582.35
  5. Step 5: Solve for x
    x = 742,582.35/987.48
  6. Step 6: Final answer
    x = 752.00

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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.