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Finding the Fourth Proportional to 586,012.80, 879,019.20 and 211,948.32

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Solution

The fourth proportional to 586,012.80, 879,019.20 and 211,948.32 is: 317,922.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    586,012.80 : 879,019.20 = 211,948.32 : x
  2. Step 2: Convert to fraction form
    586,012.80/879,019.20 = 211,948.32/x
  3. Step 3: Cross multiply
    586,012.80x = 879,019.20 × 211,948.32
  4. Step 4: Simplify right side
    586,012.80x = 186,306,642,687.74
  5. Step 5: Solve for x
    x = 186,306,642,687.74/586,012.80
  6. Step 6: Final answer
    x = 317,922.48

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Double scale
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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.