Home / 612,117.40-918,176.10-387,731.20

Finding the Fourth Proportional to 612,117.40, 918,176.10 and 387,731.20

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Solution

The fourth proportional to 612,117.40, 918,176.10 and 387,731.20 is: 581,596.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    612,117.40 : 918,176.10 = 387,731.20 : x
  2. Step 2: Convert to fraction form
    612,117.40/918,176.10 = 387,731.20/x
  3. Step 3: Cross multiply
    612,117.40x = 918,176.10 × 387,731.20
  4. Step 4: Simplify right side
    612,117.40x = 356,005,521,064.32
  5. Step 5: Solve for x
    x = 356,005,521,064.32/612,117.40
  6. Step 6: Final answer
    x = 581,596.80

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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.