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Finding the Fourth Proportional to 261,653.40, 392,480.10 and 253,877.40

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Solution

The fourth proportional to 261,653.40, 392,480.10 and 253,877.40 is: 380,816.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    261,653.40 : 392,480.10 = 253,877.40 : x
  2. Step 2: Convert to fraction form
    261,653.40/392,480.10 = 253,877.40/x
  3. Step 3: Cross multiply
    261,653.40x = 392,480.10 × 253,877.40
  4. Step 4: Simplify right side
    261,653.40x = 99,641,827,339.74
  5. Step 5: Solve for x
    x = 99,641,827,339.74/261,653.40
  6. Step 6: Final answer
    x = 380,816.10

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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.