Home / 289,710,021.60-434,565,032.40-257,965,279.20

Finding the Fourth Proportional to 289,710,021.60, 434,565,032.40 and 257,965,279.20

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Solution

The fourth proportional to 289,710,021.60, 434,565,032.40 and 257,965,279.20 is: 386,947,918.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    289,710,021.60 : 434,565,032.40 = 257,965,279.20 : x
  2. Step 2: Convert to fraction form
    289,710,021.60/434,565,032.40 = 257,965,279.20/x
  3. Step 3: Cross multiply
    289,710,021.60x = 434,565,032.40 × 257,965,279.20
  4. Step 4: Simplify right side
    289,710,021.60x = 112,102,689,913,623,040
  5. Step 5: Solve for x
    x = 112,102,689,913,623,040/289,710,021.60
  6. Step 6: Final answer
    x = 386,947,918.80

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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.