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Finding the Fourth Proportional to 261,655.20, 392,482.80 and 64,663.20

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Solution

The fourth proportional to 261,655.20, 392,482.80 and 64,663.20 is: 96,994.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    261,655.20 : 392,482.80 = 64,663.20 : x
  2. Step 2: Convert to fraction form
    261,655.20/392,482.80 = 64,663.20/x
  3. Step 3: Cross multiply
    261,655.20x = 392,482.80 × 64,663.20
  4. Step 4: Simplify right side
    261,655.20x = 25,379,193,792.96
  5. Step 5: Solve for x
    x = 25,379,193,792.96/261,655.20
  6. Step 6: Final answer
    x = 96,994.80

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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.