Home / 390,822.80-586,428.60-154,173.20

Finding the Fourth Proportional to 390,822.80, 586,428.60 and 154,173.20

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Solution

The fourth proportional to 390,822.80, 586,428.60 and 154,173.20 is: 231,336.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    390,822.80 : 586,428.60 = 154,173.20 : x
  2. Step 2: Convert to fraction form
    390,822.80/586,428.60 = 154,173.20/x
  3. Step 3: Cross multiply
    390,822.80x = 586,428.60 × 154,173.20
  4. Step 4: Simplify right side
    390,822.80x = 90,411,573,833.52
  5. Step 5: Solve for x
    x = 90,411,573,833.52/390,822.80
  6. Step 6: Final answer
    x = 231,336.49

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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.