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Finding the Fourth Proportional to 652,457,339.40, 978,686,009.10 and 221,635,835.40

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Solution

The fourth proportional to 652,457,339.40, 978,686,009.10 and 221,635,835.40 is: 332,453,753.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    652,457,339.40 : 978,686,009.10 = 221,635,835.40 : x
  2. Step 2: Convert to fraction form
    652,457,339.40/978,686,009.10 = 221,635,835.40/x
  3. Step 3: Cross multiply
    652,457,339.40x = 978,686,009.10 × 221,635,835.40
  4. Step 4: Simplify right side
    652,457,339.40x = 216,911,891,221,170,528
  5. Step 5: Solve for x
    x = 216,911,891,221,170,528/652,457,339.40
  6. Step 6: Final answer
    x = 332,453,753.10

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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.