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Finding the Fourth Proportional to 710,158.20, 980,013.08 and 387,868.36

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Solution

The fourth proportional to 710,158.20, 980,013.08 and 387,868.36 is: 535,255.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    710,158.20 : 980,013.08 = 387,868.36 : x
  2. Step 2: Convert to fraction form
    710,158.20/980,013.08 = 387,868.36/x
  3. Step 3: Cross multiply
    710,158.20x = 980,013.08 × 387,868.36
  4. Step 4: Simplify right side
    710,158.20x = 380,116,066,118.15
  5. Step 5: Solve for x
    x = 380,116,066,118.15/710,158.20
  6. Step 6: Final answer
    x = 535,255.48

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1.5x scale

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.