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Finding the Fourth Proportional to 608,465.40, 912,698.10 and 384,079.20

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Solution

The fourth proportional to 608,465.40, 912,698.10 and 384,079.20 is: 576,118.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    608,465.40 : 912,698.10 = 384,079.20 : x
  2. Step 2: Convert to fraction form
    608,465.40/912,698.10 = 384,079.20/x
  3. Step 3: Cross multiply
    608,465.40x = 912,698.10 × 384,079.20
  4. Step 4: Simplify right side
    608,465.40x = 350,548,356,089.52
  5. Step 5: Solve for x
    x = 350,548,356,089.52/608,465.40
  6. Step 6: Final answer
    x = 576,118.80

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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.