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Finding the Fourth Proportional to 285,148.80, 427,723.20 and 283,510.40

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Solution

The fourth proportional to 285,148.80, 427,723.20 and 283,510.40 is: 425,265.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    285,148.80 : 427,723.20 = 283,510.40 : x
  2. Step 2: Convert to fraction form
    285,148.80/427,723.20 = 283,510.40/x
  3. Step 3: Cross multiply
    285,148.80x = 427,723.20 × 283,510.40
  4. Step 4: Simplify right side
    285,148.80x = 121,263,975,521.28
  5. Step 5: Solve for x
    x = 121,263,975,521.28/285,148.80
  6. Step 6: Final answer
    x = 425,265.60

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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.