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Finding the Fourth Proportional to 612,176.80, 918,265.20 and 297,248.80

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Solution

The fourth proportional to 612,176.80, 918,265.20 and 297,248.80 is: 445,873.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    612,176.80 : 918,265.20 = 297,248.80 : x
  2. Step 2: Convert to fraction form
    612,176.80/918,265.20 = 297,248.80/x
  3. Step 3: Cross multiply
    612,176.80x = 918,265.20 × 297,248.80
  4. Step 4: Simplify right side
    612,176.80x = 272,953,228,781.76
  5. Step 5: Solve for x
    x = 272,953,228,781.76/612,176.80
  6. Step 6: Final answer
    x = 445,873.20

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Double scale
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Similar ratio
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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.