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Finding the Fourth Proportional to 586,686.40, 880,029.60 and 212,721.60

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Solution

The fourth proportional to 586,686.40, 880,029.60 and 212,721.60 is: 319,082.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    586,686.40 : 880,029.60 = 212,721.60 : x
  2. Step 2: Convert to fraction form
    586,686.40/880,029.60 = 212,721.60/x
  3. Step 3: Cross multiply
    586,686.40x = 880,029.60 × 212,721.60
  4. Step 4: Simplify right side
    586,686.40x = 187,201,304,559.36
  5. Step 5: Solve for x
    x = 187,201,304,559.36/586,686.40
  6. Step 6: Final answer
    x = 319,082.40

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Similar ratio
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1.5x scale

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.