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Finding the Fourth Proportional to 261,703.60, 392,555.40 and 219,713.20

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Solution

The fourth proportional to 261,703.60, 392,555.40 and 219,713.20 is: 329,569.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    261,703.60 : 392,555.40 = 219,713.20 : x
  2. Step 2: Convert to fraction form
    261,703.60/392,555.40 = 219,713.20/x
  3. Step 3: Cross multiply
    261,703.60x = 392,555.40 × 219,713.20
  4. Step 4: Simplify right side
    261,703.60x = 86,249,603,111.28
  5. Step 5: Solve for x
    x = 86,249,603,111.28/261,703.60
  6. Step 6: Final answer
    x = 329,569.80

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Similar ratio
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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.