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Finding the Fourth Proportional to 390,322.92, 585,681.12 and 153,835.32

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Solution

The fourth proportional to 390,322.92, 585,681.12 and 153,835.32 is: 230,830.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    390,322.92 : 585,681.12 = 153,835.32 : x
  2. Step 2: Convert to fraction form
    390,322.92/585,681.12 = 153,835.32/x
  3. Step 3: Cross multiply
    390,322.92x = 585,681.12 × 153,835.32
  4. Step 4: Simplify right side
    390,322.92x = 90,098,442,513.16
  5. Step 5: Solve for x
    x = 90,098,442,513.16/390,322.92
  6. Step 6: Final answer
    x = 230,830.52

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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.