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Finding the Fourth Proportional to 710,330.78, 980,244.12 and 388,032.60

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Solution

The fourth proportional to 710,330.78, 980,244.12 and 388,032.60 is: 535,478.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    710,330.78 : 980,244.12 = 388,032.60 : x
  2. Step 2: Convert to fraction form
    710,330.78/980,244.12 = 388,032.60/x
  3. Step 3: Cross multiply
    710,330.78x = 980,244.12 × 388,032.60
  4. Step 4: Simplify right side
    710,330.78x = 380,366,674,518.31
  5. Step 5: Solve for x
    x = 380,366,674,518.31/710,330.78
  6. Step 6: Final answer
    x = 535,478.24

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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.