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Finding the Fourth Proportional to 710,640.42, 980,686.35 and 388,355.46

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Solution

The fourth proportional to 710,640.42, 980,686.35 and 388,355.46 is: 535,931.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    710,640.42 : 980,686.35 = 388,355.46 : x
  2. Step 2: Convert to fraction form
    710,640.42/980,686.35 = 388,355.46/x
  3. Step 3: Cross multiply
    710,640.42x = 980,686.35 × 388,355.46
  4. Step 4: Simplify right side
    710,640.42x = 380,854,898,569.97
  5. Step 5: Solve for x
    x = 380,854,898,569.97/710,640.42
  6. Step 6: Final answer
    x = 535,931.94

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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.