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Finding the Fourth Proportional to 390,874.30, 528,095.03 and 390,874.30

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Solution

The fourth proportional to 390,874.30, 528,095.03 and 390,874.30 is: 528,095.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    390,874.30 : 528,095.03 = 390,874.30 : x
  2. Step 2: Convert to fraction form
    390,874.30/528,095.03 = 390,874.30/x
  3. Step 3: Cross multiply
    390,874.30x = 528,095.03 × 390,874.30
  4. Step 4: Simplify right side
    390,874.30x = 206,418,775,184.73
  5. Step 5: Solve for x
    x = 206,418,775,184.73/390,874.30
  6. Step 6: Final answer
    x = 528,095.03

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.35) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.