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Finding the Fourth Proportional to 390,292.16, 585,477.17 and 105,987.32

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Solution

The fourth proportional to 390,292.16, 585,477.17 and 105,987.32 is: 158,991.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    390,292.16 : 585,477.17 = 105,987.32 : x
  2. Step 2: Convert to fraction form
    390,292.16/585,477.17 = 105,987.32/x
  3. Step 3: Cross multiply
    390,292.16x = 585,477.17 × 105,987.32
  4. Step 4: Simplify right side
    390,292.16x = 62,053,152,712.16
  5. Step 5: Solve for x
    x = 62,053,152,712.16/390,292.16
  6. Step 6: Final answer
    x = 158,991.54

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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.