Home / 387,123.60-579,907.80-268,928.40

Finding the Fourth Proportional to 387,123.60, 579,907.80 and 268,928.40

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Solution

The fourth proportional to 387,123.60, 579,907.80 and 268,928.40 is: 402,852.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    387,123.60 : 579,907.80 = 268,928.40 : x
  2. Step 2: Convert to fraction form
    387,123.60/579,907.80 = 268,928.40/x
  3. Step 3: Cross multiply
    387,123.60x = 579,907.80 × 268,928.40
  4. Step 4: Simplify right side
    387,123.60x = 155,953,676,801.52
  5. Step 5: Solve for x
    x = 155,953,676,801.52/387,123.60
  6. Step 6: Final answer
    x = 402,852.41

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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.