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Finding the Fourth Proportional to 710,275.68, 980,164.11 and 387,987.21

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Solution

The fourth proportional to 710,275.68, 980,164.11 and 387,987.21 is: 535,413.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    710,275.68 : 980,164.11 = 387,987.21 : x
  2. Step 2: Convert to fraction form
    710,275.68/980,164.11 = 387,987.21/x
  3. Step 3: Cross multiply
    710,275.68x = 980,164.11 × 387,987.21
  4. Step 4: Simplify right side
    710,275.68x = 380,291,138,381.03
  5. Step 5: Solve for x
    x = 380,291,138,381.03/710,275.68
  6. Step 6: Final answer
    x = 535,413.43

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Double scale
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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.