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Finding the Fourth Proportional to 564,479.90, 778,981.97 and 319,460.21

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Solution

The fourth proportional to 564,479.90, 778,981.97 and 319,460.21 is: 440,854.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    564,479.90 : 778,981.97 = 319,460.21 : x
  2. Step 2: Convert to fraction form
    564,479.90/778,981.97 = 319,460.21/x
  3. Step 3: Cross multiply
    564,479.90x = 778,981.97 × 319,460.21
  4. Step 4: Simplify right side
    564,479.90x = 248,853,744,072.57
  5. Step 5: Solve for x
    x = 248,853,744,072.57/564,479.90
  6. Step 6: Final answer
    x = 440,854.92

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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.