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Finding the Fourth Proportional to 561,279.32, 774,480.04 and 319,572.08

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Solution

The fourth proportional to 561,279.32, 774,480.04 and 319,572.08 is: 440,960.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    561,279.32 : 774,480.04 = 319,572.08 : x
  2. Step 2: Convert to fraction form
    561,279.32/774,480.04 = 319,572.08/x
  3. Step 3: Cross multiply
    561,279.32x = 774,480.04 × 319,572.08
  4. Step 4: Simplify right side
    561,279.32x = 247,502,197,301.28
  5. Step 5: Solve for x
    x = 247,502,197,301.28/561,279.32
  6. Step 6: Final answer
    x = 440,960.83

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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.