Home / 761,686.40-1,142,529.42-312,100.40

Finding the Fourth Proportional to 761,686.40, 1,142,529.42 and 312,100.40

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Solution

The fourth proportional to 761,686.40, 1,142,529.42 and 312,100.40 is: 468,150.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    761,686.40 : 1,142,529.42 = 312,100.40 : x
  2. Step 2: Convert to fraction form
    761,686.40/1,142,529.42 = 312,100.40/x
  3. Step 3: Cross multiply
    761,686.40x = 1,142,529.42 × 312,100.40
  4. Step 4: Simplify right side
    761,686.40x = 356,583,888,993.77
  5. Step 5: Solve for x
    x = 356,583,888,993.77/761,686.40
  6. Step 6: Final answer
    x = 468,150.53

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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.