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Finding the Fourth Proportional to 672,981.12, 928,712.16 and 386,519.76

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Solution

The fourth proportional to 672,981.12, 928,712.16 and 386,519.76 is: 533,396.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    672,981.12 : 928,712.16 = 386,519.76 : x
  2. Step 2: Convert to fraction form
    672,981.12/928,712.16 = 386,519.76/x
  3. Step 3: Cross multiply
    672,981.12x = 928,712.16 × 386,519.76
  4. Step 4: Simplify right side
    672,981.12x = 358,965,601,192.28
  5. Step 5: Solve for x
    x = 358,965,601,192.28/672,981.12
  6. Step 6: Final answer
    x = 533,396.24

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1.5x scale

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.