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Finding the Fourth Proportional to 390,784.24, 585,870.13 and 154,303.93

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Solution

The fourth proportional to 390,784.24, 585,870.13 and 154,303.93 is: 231,334.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    390,784.24 : 585,870.13 = 154,303.93 : x
  2. Step 2: Convert to fraction form
    390,784.24/585,870.13 = 154,303.93/x
  3. Step 3: Cross multiply
    390,784.24x = 585,870.13 × 154,303.93
  4. Step 4: Simplify right side
    390,784.24x = 90,402,061,158.31
  5. Step 5: Solve for x
    x = 90,402,061,158.31/390,784.24
  6. Step 6: Final answer
    x = 231,334.97

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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.