Home / 289,615,405.60-434,423,108.40-257,870,663.20

Finding the Fourth Proportional to 289,615,405.60, 434,423,108.40 and 257,870,663.20

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Solution

The fourth proportional to 289,615,405.60, 434,423,108.40 and 257,870,663.20 is: 386,805,994.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    289,615,405.60 : 434,423,108.40 = 257,870,663.20 : x
  2. Step 2: Convert to fraction form
    289,615,405.60/434,423,108.40 = 257,870,663.20/x
  3. Step 3: Cross multiply
    289,615,405.60x = 434,423,108.40 × 257,870,663.20
  4. Step 4: Simplify right side
    289,615,405.60x = 112,024,975,072,513,472
  5. Step 5: Solve for x
    x = 112,024,975,072,513,472/289,615,405.60
  6. Step 6: Final answer
    x = 386,805,994.80

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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.