Home / 256,404,985.20-384,607,477.80-74,658,092.40

Finding the Fourth Proportional to 256,404,985.20, 384,607,477.80 and 74,658,092.40

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Solution

The fourth proportional to 256,404,985.20, 384,607,477.80 and 74,658,092.40 is: 111,987,138.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    256,404,985.20 : 384,607,477.80 = 74,658,092.40 : x
  2. Step 2: Convert to fraction form
    256,404,985.20/384,607,477.80 = 74,658,092.40/x
  3. Step 3: Cross multiply
    256,404,985.20x = 384,607,477.80 × 74,658,092.40
  4. Step 4: Simplify right side
    256,404,985.20x = 28,714,060,615,323,352
  5. Step 5: Solve for x
    x = 28,714,060,615,323,352/256,404,985.20
  6. Step 6: Final answer
    x = 111,987,138.60

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1.5x scale

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.