Home / 390,921,985.60-586,009,730.40-145,212,827.20

Finding the Fourth Proportional to 390,921,985.60, 586,009,730.40 and 145,212,827.20

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Solution

The fourth proportional to 390,921,985.60, 586,009,730.40 and 145,212,827.20 is: 217,680,593.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    390,921,985.60 : 586,009,730.40 = 145,212,827.20 : x
  2. Step 2: Convert to fraction form
    390,921,985.60/586,009,730.40 = 145,212,827.20/x
  3. Step 3: Cross multiply
    390,921,985.60x = 586,009,730.40 × 145,212,827.20
  4. Step 4: Simplify right side
    390,921,985.60x = 85,096,129,718,093,776
  5. Step 5: Solve for x
    x = 85,096,129,718,093,776/390,921,985.60
  6. Step 6: Final answer
    x = 217,680,593.19

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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.