Home / 1,020,005.30-1,530,384.60-421,018.40

Finding the Fourth Proportional to 1,020,005.30, 1,530,384.60 and 421,018.40

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Solution

The fourth proportional to 1,020,005.30, 1,530,384.60 and 421,018.40 is: 631,683.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,020,005.30 : 1,530,384.60 = 421,018.40 : x
  2. Step 2: Convert to fraction form
    1,020,005.30/1,530,384.60 = 421,018.40/x
  3. Step 3: Cross multiply
    1,020,005.30x = 1,530,384.60 × 421,018.40
  4. Step 4: Simplify right side
    1,020,005.30x = 644,320,075,676.64
  5. Step 5: Solve for x
    x = 644,320,075,676.64/1,020,005.30
  6. Step 6: Final answer
    x = 631,683.07

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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.