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Finding the Fourth Proportional to 563,239.32, 777,240.54 and 321,512.28

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Solution

The fourth proportional to 563,239.32, 777,240.54 and 321,512.28 is: 443,669.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    563,239.32 : 777,240.54 = 321,512.28 : x
  2. Step 2: Convert to fraction form
    563,239.32/777,240.54 = 321,512.28/x
  3. Step 3: Cross multiply
    563,239.32x = 777,240.54 × 321,512.28
  4. Step 4: Simplify right side
    563,239.32x = 249,892,378,123.83
  5. Step 5: Solve for x
    x = 249,892,378,123.83/563,239.32
  6. Step 6: Final answer
    x = 443,669.98

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Double scale
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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.