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Finding the Fourth Proportional to 662,146.74, 913,792.59 and 390,226.11

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Solution

The fourth proportional to 662,146.74, 913,792.59 and 390,226.11 is: 538,529.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    662,146.74 : 913,792.59 = 390,226.11 : x
  2. Step 2: Convert to fraction form
    662,146.74/913,792.59 = 390,226.11/x
  3. Step 3: Cross multiply
    662,146.74x = 913,792.59 × 390,226.11
  4. Step 4: Simplify right side
    662,146.74x = 356,585,727,742.53
  5. Step 5: Solve for x
    x = 356,585,727,742.53/662,146.74
  6. Step 6: Final answer
    x = 538,529.76

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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.