Home / 711,481,280.40-981,620,349.48-398,165,711.76

Finding the Fourth Proportional to 711,481,280.40, 981,620,349.48 and 398,165,711.76

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Solution

The fourth proportional to 711,481,280.40, 981,620,349.48 and 398,165,711.76 is: 549,343,427.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    711,481,280.40 : 981,620,349.48 = 398,165,711.76 : x
  2. Step 2: Convert to fraction form
    711,481,280.40/981,620,349.48 = 398,165,711.76/x
  3. Step 3: Cross multiply
    711,481,280.40x = 981,620,349.48 × 398,165,711.76
  4. Step 4: Simplify right side
    711,481,280.40x = 390,847,565,128,804,160
  5. Step 5: Solve for x
    x = 390,847,565,128,804,160/711,481,280.40
  6. Step 6: Final answer
    x = 549,343,427.43

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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.