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Finding the Fourth Proportional to 561,081.12, 774,296.88 and 319,379.24

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Solution

The fourth proportional to 561,081.12, 774,296.88 and 319,379.24 is: 440,746.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    561,081.12 : 774,296.88 = 319,379.24 : x
  2. Step 2: Convert to fraction form
    561,081.12/774,296.88 = 319,379.24/x
  3. Step 3: Cross multiply
    561,081.12x = 774,296.88 × 319,379.24
  4. Step 4: Simplify right side
    561,081.12x = 247,294,349,068.77
  5. Step 5: Solve for x
    x = 247,294,349,068.77/561,081.12
  6. Step 6: Final answer
    x = 440,746.16

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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.