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Finding the Fourth Proportional to 553,088.66, 763,335.09 and 311,418.32

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Solution

The fourth proportional to 553,088.66, 763,335.09 and 311,418.32 is: 429,798.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    553,088.66 : 763,335.09 = 311,418.32 : x
  2. Step 2: Convert to fraction form
    553,088.66/763,335.09 = 311,418.32/x
  3. Step 3: Cross multiply
    553,088.66x = 763,335.09 × 311,418.32
  4. Step 4: Simplify right side
    553,088.66x = 237,716,527,508.17
  5. Step 5: Solve for x
    x = 237,716,527,508.17/553,088.66
  6. Step 6: Final answer
    x = 429,798.23

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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.