Home / 258,730,641.60-388,095,962.40-212,814,139.20

Finding the Fourth Proportional to 258,730,641.60, 388,095,962.40 and 212,814,139.20

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Solution

The fourth proportional to 258,730,641.60, 388,095,962.40 and 212,814,139.20 is: 319,221,208.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    258,730,641.60 : 388,095,962.40 = 212,814,139.20 : x
  2. Step 2: Convert to fraction form
    258,730,641.60/388,095,962.40 = 212,814,139.20/x
  3. Step 3: Cross multiply
    258,730,641.60x = 388,095,962.40 × 212,814,139.20
  4. Step 4: Simplify right side
    258,730,641.60x = 82,592,308,165,151,552
  5. Step 5: Solve for x
    x = 82,592,308,165,151,552/258,730,641.60
  6. Step 6: Final answer
    x = 319,221,208.80

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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.