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Finding the Fourth Proportional to 709,808.60, 979,490.27 and 387,518.01

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Solution

The fourth proportional to 709,808.60, 979,490.27 and 387,518.01 is: 534,749.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    709,808.60 : 979,490.27 = 387,518.01 : x
  2. Step 2: Convert to fraction form
    709,808.60/979,490.27 = 387,518.01/x
  3. Step 3: Cross multiply
    709,808.60x = 979,490.27 × 387,518.01
  4. Step 4: Simplify right side
    709,808.60x = 379,570,118,307.17
  5. Step 5: Solve for x
    x = 379,570,118,307.17/709,808.60
  6. Step 6: Final answer
    x = 534,749.96

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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.