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Finding the Fourth Proportional to 390,064.58, 585,054.95 and 264,510.74

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Solution

The fourth proportional to 390,064.58, 585,054.95 and 264,510.74 is: 396,737.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    390,064.58 : 585,054.95 = 264,510.74 : x
  2. Step 2: Convert to fraction form
    390,064.58/585,054.95 = 264,510.74/x
  3. Step 3: Cross multiply
    390,064.58x = 585,054.95 × 264,510.74
  4. Step 4: Simplify right side
    390,064.58x = 154,753,314,839.89
  5. Step 5: Solve for x
    x = 154,753,314,839.89/390,064.58
  6. Step 6: Final answer
    x = 396,737.68

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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.