Home / 430,638,643.40-645,188,141.10-262,070,515.40

Finding the Fourth Proportional to 430,638,643.40, 645,188,141.10 and 262,070,515.40

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Solution

The fourth proportional to 430,638,643.40, 645,188,141.10 and 262,070,515.40 is: 392,637,287.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    430,638,643.40 : 645,188,141.10 = 262,070,515.40 : x
  2. Step 2: Convert to fraction form
    430,638,643.40/645,188,141.10 = 262,070,515.40/x
  3. Step 3: Cross multiply
    430,638,643.40x = 645,188,141.10 × 262,070,515.40
  4. Step 4: Simplify right side
    430,638,643.40x = 169,084,788,668,044,928
  5. Step 5: Solve for x
    x = 169,084,788,668,044,928/430,638,643.40
  6. Step 6: Final answer
    x = 392,637,287.11

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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.