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Finding the Fourth Proportional to 1,018,428, 1,527,642 and 353,580

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Solution

The fourth proportional to 1,018,428, 1,527,642 and 353,580 is: 530,370

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,018,428 : 1,527,642 = 353,580 : x
  2. Step 2: Convert to fraction form
    1,018,428/1,527,642 = 353,580/x
  3. Step 3: Cross multiply
    1,018,428x = 1,527,642 × 353,580
  4. Step 4: Simplify right side
    1,018,428x = 540,143,658,360
  5. Step 5: Solve for x
    x = 540,143,658,360/1,018,428
  6. Step 6: Final answer
    x = 530,370

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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.