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Finding the Fourth Proportional to 487,478.80, 729,792.60 and 347,510.80

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Solution

The fourth proportional to 487,478.80, 729,792.60 and 347,510.80 is: 520,249.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    487,478.80 : 729,792.60 = 347,510.80 : x
  2. Step 2: Convert to fraction form
    487,478.80/729,792.60 = 347,510.80/x
  3. Step 3: Cross multiply
    487,478.80x = 729,792.60 × 347,510.80
  4. Step 4: Simplify right side
    487,478.80x = 253,610,810,260.08
  5. Step 5: Solve for x
    x = 253,610,810,260.08/487,478.80
  6. Step 6: Final answer
    x = 520,249.93

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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.