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Finding the Fourth Proportional to 870.04, 1,200.68 and 477.07

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Solution

The fourth proportional to 870.04, 1,200.68 and 477.07 is: 658.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    870.04 : 1,200.68 = 477.07 : x
  2. Step 2: Convert to fraction form
    870.04/1,200.68 = 477.07/x
  3. Step 3: Cross multiply
    870.04x = 1,200.68 × 477.07
  4. Step 4: Simplify right side
    870.04x = 572,808.41
  5. Step 5: Solve for x
    x = 572,808.41/870.04
  6. Step 6: Final answer
    x = 658.37

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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.