Home / 287,748,335.40-431,622,503.10-257,515,247.40

Finding the Fourth Proportional to 287,748,335.40, 431,622,503.10 and 257,515,247.40

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Solution

The fourth proportional to 287,748,335.40, 431,622,503.10 and 257,515,247.40 is: 386,272,871.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    287,748,335.40 : 431,622,503.10 = 257,515,247.40 : x
  2. Step 2: Convert to fraction form
    287,748,335.40/431,622,503.10 = 257,515,247.40/x
  3. Step 3: Cross multiply
    287,748,335.40x = 431,622,503.10 × 257,515,247.40
  4. Step 4: Simplify right side
    287,748,335.40x = 111,149,375,669,203,776
  5. Step 5: Solve for x
    x = 111,149,375,669,203,776/287,748,335.40
  6. Step 6: Final answer
    x = 386,272,871.10

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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.