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Finding the Fourth Proportional to 285,551.16, 428,266.59 and 85,812.45

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Solution

The fourth proportional to 285,551.16, 428,266.59 and 85,812.45 is: 128,700.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    285,551.16 : 428,266.59 = 85,812.45 : x
  2. Step 2: Convert to fraction form
    285,551.16/428,266.59 = 85,812.45/x
  3. Step 3: Cross multiply
    285,551.16x = 428,266.59 × 85,812.45
  4. Step 4: Simplify right side
    285,551.16x = 36,750,605,341.05
  5. Step 5: Solve for x
    x = 36,750,605,341.05/285,551.16
  6. Step 6: Final answer
    x = 128,700.60

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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.