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Finding the Fourth Proportional to 630,442.20, 945,663.30 and 314,947.80

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Solution

The fourth proportional to 630,442.20, 945,663.30 and 314,947.80 is: 472,421.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    630,442.20 : 945,663.30 = 314,947.80 : x
  2. Step 2: Convert to fraction form
    630,442.20/945,663.30 = 314,947.80/x
  3. Step 3: Cross multiply
    630,442.20x = 945,663.30 × 314,947.80
  4. Step 4: Simplify right side
    630,442.20x = 297,834,575,875.74
  5. Step 5: Solve for x
    x = 297,834,575,875.74/630,442.20
  6. Step 6: Final answer
    x = 472,421.70

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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.