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Finding the Fourth Proportional to 570,298.12, 787,001.88 and 315,643.84

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Solution

The fourth proportional to 570,298.12, 787,001.88 and 315,643.84 is: 435,583.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    570,298.12 : 787,001.88 = 315,643.84 : x
  2. Step 2: Convert to fraction form
    570,298.12/787,001.88 = 315,643.84/x
  3. Step 3: Cross multiply
    570,298.12x = 787,001.88 × 315,643.84
  4. Step 4: Simplify right side
    570,298.12x = 248,412,295,490.42
  5. Step 5: Solve for x
    x = 248,412,295,490.42/570,298.12
  6. Step 6: Final answer
    x = 435,583.23

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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.