Home / 921,138-1,271,263.91-513,306.24

Finding the Fourth Proportional to 921,138, 1,271,263.91 and 513,306.24

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Solution

The fourth proportional to 921,138, 1,271,263.91 and 513,306.24 is: 708,414.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    921,138 : 1,271,263.91 = 513,306.24 : x
  2. Step 2: Convert to fraction form
    921,138/1,271,263.91 = 513,306.24/x
  3. Step 3: Cross multiply
    921,138x = 1,271,263.91 × 513,306.24
  4. Step 4: Simplify right side
    921,138x = 652,547,697,689.80
  5. Step 5: Solve for x
    x = 652,547,697,689.80/921,138
  6. Step 6: Final answer
    x = 708,414.70

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.