Home / 390,811.80-586,412.10-154,162.20

Finding the Fourth Proportional to 390,811.80, 586,412.10 and 154,162.20

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Solution

The fourth proportional to 390,811.80, 586,412.10 and 154,162.20 is: 231,319.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    390,811.80 : 586,412.10 = 154,162.20 : x
  2. Step 2: Convert to fraction form
    390,811.80/586,412.10 = 154,162.20/x
  3. Step 3: Cross multiply
    390,811.80x = 586,412.10 × 154,162.20
  4. Step 4: Simplify right side
    390,811.80x = 90,402,579,442.62
  5. Step 5: Solve for x
    x = 90,402,579,442.62/390,811.80
  6. Step 6: Final answer
    x = 231,319.98

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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.