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Finding the Fourth Proportional to 610,420.80, 915,631.20 and 311,822.40

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Solution

The fourth proportional to 610,420.80, 915,631.20 and 311,822.40 is: 467,733.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    610,420.80 : 915,631.20 = 311,822.40 : x
  2. Step 2: Convert to fraction form
    610,420.80/915,631.20 = 311,822.40/x
  3. Step 3: Cross multiply
    610,420.80x = 915,631.20 × 311,822.40
  4. Step 4: Simplify right side
    610,420.80x = 285,514,318,298.88
  5. Step 5: Solve for x
    x = 285,514,318,298.88/610,420.80
  6. Step 6: Final answer
    x = 467,733.60

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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.