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Finding the Fourth Proportional to 458,541.40, 687,812.10 and 403,245.40

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Solution

The fourth proportional to 458,541.40, 687,812.10 and 403,245.40 is: 604,868.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    458,541.40 : 687,812.10 = 403,245.40 : x
  2. Step 2: Convert to fraction form
    458,541.40/687,812.10 = 403,245.40/x
  3. Step 3: Cross multiply
    458,541.40x = 687,812.10 × 403,245.40
  4. Step 4: Simplify right side
    458,541.40x = 277,357,065,389.34
  5. Step 5: Solve for x
    x = 277,357,065,389.34/458,541.40
  6. Step 6: Final answer
    x = 604,868.10

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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.