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Finding the Fourth Proportional to 623,855.52, 859,905.18 and 487,649.16

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Solution

The fourth proportional to 623,855.52, 859,905.18 and 487,649.16 is: 672,162.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    623,855.52 : 859,905.18 = 487,649.16 : x
  2. Step 2: Convert to fraction form
    623,855.52/859,905.18 = 487,649.16/x
  3. Step 3: Cross multiply
    623,855.52x = 859,905.18 × 487,649.16
  4. Step 4: Simplify right side
    623,855.52x = 419,332,038,706.65
  5. Step 5: Solve for x
    x = 419,332,038,706.65/623,855.52
  6. Step 6: Final answer
    x = 672,162.10

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.