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Finding the Fourth Proportional to 554,399.68, 765,070.50 and 312,681.52

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Solution

The fourth proportional to 554,399.68, 765,070.50 and 312,681.52 is: 431,499.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    554,399.68 : 765,070.50 = 312,681.52 : x
  2. Step 2: Convert to fraction form
    554,399.68/765,070.50 = 312,681.52/x
  3. Step 3: Cross multiply
    554,399.68x = 765,070.50 × 312,681.52
  4. Step 4: Simplify right side
    554,399.68x = 239,223,406,847.16
  5. Step 5: Solve for x
    x = 239,223,406,847.16/554,399.68
  6. Step 6: Final answer
    x = 431,499.90

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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.