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Finding the Fourth Proportional to 710,618.27, 980,637.03 and 388,330.30

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Solution

The fourth proportional to 710,618.27, 980,637.03 and 388,330.30 is: 535,886.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    710,618.27 : 980,637.03 = 388,330.30 : x
  2. Step 2: Convert to fraction form
    710,618.27/980,637.03 = 388,330.30/x
  3. Step 3: Cross multiply
    710,618.27x = 980,637.03 × 388,330.30
  4. Step 4: Simplify right side
    710,618.27x = 380,811,073,276.81
  5. Step 5: Solve for x
    x = 380,811,073,276.81/710,618.27
  6. Step 6: Final answer
    x = 535,886.98

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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.