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Finding the Fourth Proportional to 372,005.80, 558,008.70 and 260,031.40

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Solution

The fourth proportional to 372,005.80, 558,008.70 and 260,031.40 is: 390,047.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    372,005.80 : 558,008.70 = 260,031.40 : x
  2. Step 2: Convert to fraction form
    372,005.80/558,008.70 = 260,031.40/x
  3. Step 3: Cross multiply
    372,005.80x = 558,008.70 × 260,031.40
  4. Step 4: Simplify right side
    372,005.80x = 145,099,783,473.18
  5. Step 5: Solve for x
    x = 145,099,783,473.18/372,005.80
  6. Step 6: Final answer
    x = 390,047.10

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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.