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Finding the Fourth Proportional to 328,095.60, 492,143.40 and 221,807.40

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Solution

The fourth proportional to 328,095.60, 492,143.40 and 221,807.40 is: 332,711.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    328,095.60 : 492,143.40 = 221,807.40 : x
  2. Step 2: Convert to fraction form
    328,095.60/492,143.40 = 221,807.40/x
  3. Step 3: Cross multiply
    328,095.60x = 492,143.40 × 221,807.40
  4. Step 4: Simplify right side
    328,095.60x = 109,161,047,981.16
  5. Step 5: Solve for x
    x = 109,161,047,981.16/328,095.60
  6. Step 6: Final answer
    x = 332,711.10

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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.