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Finding the Fourth Proportional to 710,219.40, 980,096.28 and 387,929.40

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Solution

The fourth proportional to 710,219.40, 980,096.28 and 387,929.40 is: 535,339.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    710,219.40 : 980,096.28 = 387,929.40 : x
  2. Step 2: Convert to fraction form
    710,219.40/980,096.28 = 387,929.40/x
  3. Step 3: Cross multiply
    710,219.40x = 980,096.28 × 387,929.40
  4. Step 4: Simplify right side
    710,219.40x = 380,208,161,842.63
  5. Step 5: Solve for x
    x = 380,208,161,842.63/710,219.40
  6. Step 6: Final answer
    x = 535,339.03

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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.