Home / 261,582.80-392,374.20-128,548.40

Finding the Fourth Proportional to 261,582.80, 392,374.20 and 128,548.40

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Solution

The fourth proportional to 261,582.80, 392,374.20 and 128,548.40 is: 192,822.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    261,582.80 : 392,374.20 = 128,548.40 : x
  2. Step 2: Convert to fraction form
    261,582.80/392,374.20 = 128,548.40/x
  3. Step 3: Cross multiply
    261,582.80x = 392,374.20 × 128,548.40
  4. Step 4: Simplify right side
    261,582.80x = 50,439,075,611.28
  5. Step 5: Solve for x
    x = 50,439,075,611.28/261,582.80
  6. Step 6: Final answer
    x = 192,822.60

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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.