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Finding the Fourth Proportional to 710,632.17, 980,685.23 and 388,355.85

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Solution

The fourth proportional to 710,632.17, 980,685.23 and 388,355.85 is: 535,938.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    710,632.17 : 980,685.23 = 388,355.85 : x
  2. Step 2: Convert to fraction form
    710,632.17/980,685.23 = 388,355.85/x
  3. Step 3: Cross multiply
    710,632.17x = 980,685.23 × 388,355.85
  4. Step 4: Simplify right side
    710,632.17x = 380,854,844,137.32
  5. Step 5: Solve for x
    x = 380,854,844,137.32/710,632.17
  6. Step 6: Final answer
    x = 535,938.08

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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.