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Finding the Fourth Proportional to 310,307.78, 465,426.81 and 85,700.16

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Solution

The fourth proportional to 310,307.78, 465,426.81 and 85,700.16 is: 128,540.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    310,307.78 : 465,426.81 = 85,700.16 : x
  2. Step 2: Convert to fraction form
    310,307.78/465,426.81 = 85,700.16/x
  3. Step 3: Cross multiply
    310,307.78x = 465,426.81 × 85,700.16
  4. Step 4: Simplify right side
    310,307.78x = 39,887,152,085.29
  5. Step 5: Solve for x
    x = 39,887,152,085.29/310,307.78
  6. Step 6: Final answer
    x = 128,540.61

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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.