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Finding the Fourth Proportional to 870.06, 1,200.70 and 477.08

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Solution

The fourth proportional to 870.06, 1,200.70 and 477.08 is: 658.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    870.06 : 1,200.70 = 477.08 : x
  2. Step 2: Convert to fraction form
    870.06/1,200.70 = 477.08/x
  3. Step 3: Cross multiply
    870.06x = 1,200.70 × 477.08
  4. Step 4: Simplify right side
    870.06x = 572,829.96
  5. Step 5: Solve for x
    x = 572,829.96/870.06
  6. Step 6: Final answer
    x = 658.38

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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.