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Finding the Fourth Proportional to 390,018.90, 547,601.10 and 390,018.90

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Solution

The fourth proportional to 390,018.90, 547,601.10 and 390,018.90 is: 547,601.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    390,018.90 : 547,601.10 = 390,018.90 : x
  2. Step 2: Convert to fraction form
    390,018.90/547,601.10 = 390,018.90/x
  3. Step 3: Cross multiply
    390,018.90x = 547,601.10 × 390,018.90
  4. Step 4: Simplify right side
    390,018.90x = 213,574,778,660.79
  5. Step 5: Solve for x
    x = 213,574,778,660.79/390,018.90
  6. Step 6: Final answer
    x = 547,601.10

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.40) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.