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Finding the Fourth Proportional to 612,235.70, 917,588.10 and 312,835.40

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Solution

The fourth proportional to 612,235.70, 917,588.10 and 312,835.40 is: 468,861.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    612,235.70 : 917,588.10 = 312,835.40 : x
  2. Step 2: Convert to fraction form
    612,235.70/917,588.10 = 312,835.40/x
  3. Step 3: Cross multiply
    612,235.70x = 917,588.10 × 312,835.40
  4. Step 4: Simplify right side
    612,235.70x = 287,054,040,298.74
  5. Step 5: Solve for x
    x = 287,054,040,298.74/612,235.70
  6. Step 6: Final answer
    x = 468,861.98

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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.