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Finding the Fourth Proportional to 390,158.06, 585,276.04 and 105,853.08

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Solution

The fourth proportional to 390,158.06, 585,276.04 and 105,853.08 is: 158,790.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    390,158.06 : 585,276.04 = 105,853.08 : x
  2. Step 2: Convert to fraction form
    390,158.06/585,276.04 = 105,853.08/x
  3. Step 3: Cross multiply
    390,158.06x = 585,276.04 × 105,853.08
  4. Step 4: Simplify right side
    390,158.06x = 61,953,271,484.20
  5. Step 5: Solve for x
    x = 61,953,271,484.20/390,158.06
  6. Step 6: Final answer
    x = 158,790.19

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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.