Home / 390,865,939.60-585,925,661.40-145,156,781.20

Finding the Fourth Proportional to 390,865,939.60, 585,925,661.40 and 145,156,781.20

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Solution

The fourth proportional to 390,865,939.60, 585,925,661.40 and 145,156,781.20 is: 217,596,557.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    390,865,939.60 : 585,925,661.40 = 145,156,781.20 : x
  2. Step 2: Convert to fraction form
    390,865,939.60/585,925,661.40 = 145,156,781.20/x
  3. Step 3: Cross multiply
    390,865,939.60x = 585,925,661.40 × 145,156,781.20
  4. Step 4: Simplify right side
    390,865,939.60x = 85,051,083,031,305,072
  5. Step 5: Solve for x
    x = 85,051,083,031,305,072/390,865,939.60
  6. Step 6: Final answer
    x = 217,596,557.83

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.