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Finding the Fourth Proportional to 390,521.44, 585,557.86 and 153,734.92

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Solution

The fourth proportional to 390,521.44, 585,557.86 and 153,734.92 is: 230,514.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    390,521.44 : 585,557.86 = 153,734.92 : x
  2. Step 2: Convert to fraction form
    390,521.44/585,557.86 = 153,734.92/x
  3. Step 3: Cross multiply
    390,521.44x = 585,557.86 × 153,734.92
  4. Step 4: Simplify right side
    390,521.44x = 90,020,690,762.47
  5. Step 5: Solve for x
    x = 90,020,690,762.47/390,521.44
  6. Step 6: Final answer
    x = 230,514.08

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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.