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Finding the Fourth Proportional to 458,557.80, 687,836.70 and 346,583.40

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Solution

The fourth proportional to 458,557.80, 687,836.70 and 346,583.40 is: 519,875.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    458,557.80 : 687,836.70 = 346,583.40 : x
  2. Step 2: Convert to fraction form
    458,557.80/687,836.70 = 346,583.40/x
  3. Step 3: Cross multiply
    458,557.80x = 687,836.70 × 346,583.40
  4. Step 4: Simplify right side
    458,557.80x = 238,392,782,130.78
  5. Step 5: Solve for x
    x = 238,392,782,130.78/458,557.80
  6. Step 6: Final answer
    x = 519,875.10

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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.