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Finding the Fourth Proportional to 710,203.47, 980,074.95 and 387,913.79

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Solution

The fourth proportional to 710,203.47, 980,074.95 and 387,913.79 is: 535,317.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    710,203.47 : 980,074.95 = 387,913.79 : x
  2. Step 2: Convert to fraction form
    710,203.47/980,074.95 = 387,913.79/x
  3. Step 3: Cross multiply
    710,203.47x = 980,074.95 × 387,913.79
  4. Step 4: Simplify right side
    710,203.47x = 380,184,583,438.19
  5. Step 5: Solve for x
    x = 380,184,583,438.19/710,203.47
  6. Step 6: Final answer
    x = 535,317.83

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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.