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Finding the Fourth Proportional to 715,444.48, 987,098.08 and 428,860.00

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Solution

The fourth proportional to 715,444.48, 987,098.08 and 428,860.00 is: 591,697.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    715,444.48 : 987,098.08 = 428,860.00 : x
  2. Step 2: Convert to fraction form
    715,444.48/987,098.08 = 428,860.00/x
  3. Step 3: Cross multiply
    715,444.48x = 987,098.08 × 428,860.00
  4. Step 4: Simplify right side
    715,444.48x = 423,326,875,509.01
  5. Step 5: Solve for x
    x = 423,326,875,509.01/715,444.48
  6. Step 6: Final answer
    x = 591,697.74

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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.