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Finding the Fourth Proportional to 908,765.80, 1,363,148.70 and 310,402.60

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Solution

The fourth proportional to 908,765.80, 1,363,148.70 and 310,402.60 is: 465,603.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    908,765.80 : 1,363,148.70 = 310,402.60 : x
  2. Step 2: Convert to fraction form
    908,765.80/1,363,148.70 = 310,402.60/x
  3. Step 3: Cross multiply
    908,765.80x = 1,363,148.70 × 310,402.60
  4. Step 4: Simplify right side
    908,765.80x = 423,124,900,666.62
  5. Step 5: Solve for x
    x = 423,124,900,666.62/908,765.80
  6. Step 6: Final answer
    x = 465,603.90

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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.