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Finding the Fourth Proportional to 423,007.20, 634,510.80 and 328,528.80

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Solution

The fourth proportional to 423,007.20, 634,510.80 and 328,528.80 is: 492,793.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    423,007.20 : 634,510.80 = 328,528.80 : x
  2. Step 2: Convert to fraction form
    423,007.20/634,510.80 = 328,528.80/x
  3. Step 3: Cross multiply
    423,007.20x = 634,510.80 × 328,528.80
  4. Step 4: Simplify right side
    423,007.20x = 208,455,071,711.04
  5. Step 5: Solve for x
    x = 208,455,071,711.04/423,007.20
  6. Step 6: Final answer
    x = 492,793.20

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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.