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Finding the Fourth Proportional to 710,639.92, 980,685.66 and 388,354.96

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Solution

The fourth proportional to 710,639.92, 980,685.66 and 388,354.96 is: 535,931.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    710,639.92 : 980,685.66 = 388,354.96 : x
  2. Step 2: Convert to fraction form
    710,639.92/980,685.66 = 388,354.96/x
  3. Step 3: Cross multiply
    710,639.92x = 980,685.66 × 388,354.96
  4. Step 4: Simplify right side
    710,639.92x = 380,854,140,261.87
  5. Step 5: Solve for x
    x = 380,854,140,261.87/710,639.92
  6. Step 6: Final answer
    x = 535,931.25

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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.