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Finding the Fourth Proportional to 502,830.70, 754,246.05 and 390,856.30

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Solution

The fourth proportional to 502,830.70, 754,246.05 and 390,856.30 is: 586,284.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    502,830.70 : 754,246.05 = 390,856.30 : x
  2. Step 2: Convert to fraction form
    502,830.70/754,246.05 = 390,856.30/x
  3. Step 3: Cross multiply
    502,830.70x = 754,246.05 × 390,856.30
  4. Step 4: Simplify right side
    502,830.70x = 294,801,820,392.62
  5. Step 5: Solve for x
    x = 294,801,820,392.62/502,830.70
  6. Step 6: Final answer
    x = 586,284.45

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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.